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Pain is a complex phenomenon which is unpleasant. Different cosmetic procedures are associated with varying degrees of pain. Various modalities are adopted to decrease the severity of pain. The commonly used is the administration of analgesics (opioid or non-steroidal). The pain is carried to the brain by pain fibres. There are various theories about the pain [1,2]. Many attempts have been undertaken to find the modalities which decrease the perception of pain by the brain. The famous ‘gate theory’ was proposed in 1965 by Melzack et al. [3]. It was proposed that the pain experience can be reduced by the activation of nerve fibres that conduct non-toxic stimuli. The theory suggested that the stimulation of larger diameter fibres (A-beta) can close a neural ‘gate’ to nocioceptive signals and can reduce the perception of the pain. The ‘gate’ is proposed to lie within the spinal cord/brainstem and inhibits the transmission of nocioceptive action potentials to higher centres in the central nervous system [4]. The “post-synaptic inhibitory and fascilitatory mechanism” provide a basis for explaining the pain reducing strategies such as rubbing the painful area or applying cold or vibration to decrease the perception of the pain. Various topical irritants used in a few ‘magic’ creams also work on the same principle. Every effort is made to decrease the perception of pain in cosmetic surgery procedures especially hair restoration. A surgeon who can perform a hair restoration without pain has an edge over his competitors. The potential patients undergoing hair restoration are very anxious about the pain level to be perceived during the procedure. Vibration anaesthesia is becoming increasing used in hair restoration to decrease pain perception. Various recent studies have demonstrated the effective use if vibrations to decrease the pain of local anaesthesia injections [5,7]. The pain of the injection has basically two components; the first is the actual needle prick and second is the discomfort felt due to the tissue stretch by the local anaesthetic drugs [8]. The following study was conducted to compare the pain level of ring block in the patients undergoing hair restoration with and without the use of vibration

Multiple studies have investigated the relationship between androgenetic alopecia and cardiovascular disease, including studies that have identified elevated rates of cardiovascular disease in patients with vertex hair loss, vertex and frontal hair loss, early onset hair loss and rapidly progressive hair loss. In addition, increased risks for hypertension, excess weight, abnormal lipids, insulin resistance, carotid atheromatosis and death from diabetes or heart disease have been reported in this population. Studies investigating an association between androgenetic alopecia and metabolic syndrome have yielded conflicting findings. Distinct guidelines for the detection and prevention of cardiovascular disease in individuals with androgenetic alopecia have not been established. In addition to the traditional risk factors for developing cardiovascular disease, included in the definition of the metabolic syndrome, several skin diseases have recently been shown to be markers of conditions relating to the patient’s overall health. Physicians should be aware of the possible connection between relatively frequent skin diseases, such as psoriasis and hair growth disruptions, including androgenetic alopecia and female pattern hair loss and cardiovascular disease. This review is concentrated on the association between insulin resistance, type 2 diabetes, abdominal fat, cardiovascular disease and hair growth disruptions as an early indicator of these underlying conditions. We have investigated the importance of robust primary clinical treatment measures to address the manifestation of hair loss due to a disruption caused by metabolic syndrome as an effective means to alleviate further stress induced hair loss, which can exacerbate the underlying cause.

Knowing the possible origin of sexist attitudes in adolescents is essential when educating them to avoid gender violence derived from them. Nurses have an important role in education for the health of children and adolescents, so we must study the risk factors that lead to these attitudes and how to prevent them. Some studies such as Landripet, et al. have undertaken to study the association between frequency of pornography use and preference for violent and coercive content in male adolescents. Sexism and pornography use have been associated by various authors. Hostile sexism is the most obvious and traditional form, based on the supposed inferiority or difference of women as a group. According to benevolent sexism, women are understood as deserving of affection, respect and protection, as long as they are limited to certain traditional feminine roles. The second is even more difficult to detect. Our aim in this work is to evaluate ambivalent sexist attitudes in young adolescents in the province of Jaén and check whether there is a relationship between use of pornography and sexual content, and the kinds of sexism studied, in order to be able to prevent these attitudes as nurses through health education. The final sample was made up of 150 participants from all school years, belonging to the same secondary school, 74 male and 76 female. They were aged between 12 and 18 years old. One of the conclusions of this work has been that the use of new technologies is in addition starting at even younger ages due to the situation of online teaching due to the pandemic, and it has been observed that age at first use is a determining factor.

Alopecia is associated with an increased risk of coronary heart disease, and it appears that there is a relationship between the degree of hair loss and the risk of coronary heart disease, meaning, the greater the severity of alopecia, the greater the risk of coronary heart disease. Alopecia is also associated with an increased risk of hypertension, hyperinsulinemia, insulin resistance, metabolic syndrome as well as elevated serum total cholesterol and triglyceride levels. It has not been definitively established whether patients with androgenetic alopecia have a higher cardiovascular risk or prevalence of metabolic syndrome, and results of recent studies indicate that androgenetic alopecia patients do not show differences in insulin resistance or the prevalence of metabolic syndrome. However, androgenetic alopecia patients do show a higher cardiovascular risk, characterised by increased inflammatory parameters and Lp(a) levels. Data collected from female populations are scarce, but it would be interesting to extend our clinical knowledge with this type of data to further our understanding of the connection between androgenetic alopecia, metabolic syndrome and cardiovascular risk. The divergence in results from different studies done in this context may simply be a result of the composition of the study populations with respect to age, gender, severity of alopecia, sample size and perhaps ethnicity. In this connection, a large group of androgenetic alopecia patients is necessary, including different representative groups and varying severities of alopecia. Furthermore, it is recommended that all women and men with androgenetic alopecia be thoroughly examined and that lifestyle changes are made early on to reduce the risk of various problems associated with metabolic syndrome, since androgenetic alopecia can be considered an early marker of metabolic syndrome.

Broad-spectrum sunscreens are now widely used worldwide as an adjunct to help prevent sunburn, skin cancers and premature skin aging. In the United States, all persons older than 6 months are recommended to apply sunscreen to all sun-exposed skin from toes to head except eyes and mouth even on cloudy days. Such a recommendation is apparently based on concepts that exposure to sunlight damages the skin, the damage is cumulative and hence any sun exposure should be minimized or prevented. This communication raises several questions suggesting that the above recommendation may need to be reconsidered. For example, numerous previous studies have indicated many potential health benefits from non-burning sun exposure including protection against sunburn, melanoma, colorectal cancer, breast cancer and prostate cancer, increasing vitamin D synthesis, helping sleep, reducing blood pressure, heart attack and stroke. Recent studies suggested that regular lifetime non-burning sun exposure may not result in premature skin aging and the skin aging is mainly caused by the intrinsic factor. Skin aging or whole-body aging has been recently postulated to be mainly attributed to a gradual reduction in cardiac output/index with age and a new anti-aging or age-reversing nutritional theory has been proposed. An apparent lack of long-term cumulative sunray damage was also supported by reported age independence in incidences of sunburn and skin cancers. It is of interest that the current US policy is different from that of World Health Organization and Australia recommending the need of sun protection only when UV Index is 3 or greater. In view of the above, some general guidelines regarding when to best apply sunscreen are proposed.

Zinc induced pediatric preventing respiratory 2019-nCoV is required that supplementation with zinc gluconate 20 mg in Zn deficient children resulted in a nearly twofold reduction of acute lower respiratory infections as well as the time to recovery. Zinc supplementation in children is associated with a reduction in the incidence and prevalence of pneumonia. Preventing 2019-nCoV pneumonia is required that zinc supplementation alone (10 to 20 mg) for more than 3 months significantly reduces in the rate of pneumonia. zinc pediatric intake may be required to be effective range 10～20 mg/d for 2019-CoV prevention, 10～30 mg/d for reduction of COVID-19 bronchitis, and 20～30 mg/d for recovery from COVID-19 pneumonia, in which Zn2+ could bind with viral surface proteins by Zn2+ions-centered tetrahedrally coordination pattern. On the other hand, for aults, the zinc-homeostatic immune concentration may provide a protective role against the COVID-19 pandemic, likely by improving the host’s resistance against viral infection. 50 mg of zinc per day might provide an additional shield against the COVID-19 pandemic, possibly by increasing the host resistance to viral infection to minimize the burden of the disease. In order to prevent that an outbreak of respiratory sickness caused by a novel coronavirus (COVID-19) has become a serious public threat and disrupted many lives,assessing the efficacy of FDA-approved Zn-ejector drugs such as disulfiram combined with interferon to treat COVID-19 infected patients has been proposed. The key strategies for preventing lung damages include avoiding direct lung infection, altering host-virus interactions, promoting immune responses, diluting virus concentrations in lung tissues by promoting viral migration to the rest of the body, maintaining waste removal balance, protecting heart function and renal function, avoiding other infections, reducing allergic reactions and anti-inflammatory. The interactions had been found on the binding specificity by Zn2+ ions-centered tetrahedral geometric coordination of the inhibitors against 3C and 3C-like proteases. In addition, transient zinc chelation TPEN and EPDTC have been noted as preventing virus replication. Zinc-induced ROS production in COVID-19 respiratory ailment and pneumonia occurs both in children and adults. In children. ROS production in zinc (Ⅱ)-immune pediatric patient with COVID-19 bronchitis and pneumonia cannot be elucidated yet. In adults, zinc induced ROS generation in pulmonary COVID-19 infected cells is that alterations of ROS-producing and scavenging pathways that are caused by respiratory viral infections are implicated in inflammation, lung epithelial disruption, and tissue damage, and, in some cases, even pulmonary fibrosis. The involvement of oxidative stress in cell deaths caused during RNA virus infection and ROS production is correlated with host cell death.

Bee venom is a very rich and varied biochemical complex, which explains the multitude of its physiological effects as well as its medical indications. In dermatology, apart from psoriasis, few studies have been conducted concerning its interest and effectiveness; however the preliminary results remain so promising and encouraging. We present a clinical case illustrating the efficacy of bee venom in cutaneous varicosities, with a review of the literature of its main dermatological indications.

Ranitidine is a widely used drug in Europe and its intake is usually well tolerated. Hypersensitivity reactions due to ranitidine are uncommon. The immediate mild reactions type are the most prevalent. In some special cases a delayed type reaction such as contact dermatitis or severe reactions with systemic involvement have been reported. In the present paper, a case report of a 78-year old patient who experienced a maculopapular eruption after 7 days of oral treatment with ranitidine is described. Patch tests were performed twice with ranitidine with positive results confirming the diagnosis. In order to discard a double sensitization and a possible cross-reactivity phenomenon, patch test was performed once with famotidine, with a negative result. This is the first maculopapular exanthema reported as type IV hypersensitivity reaction to ranitidine confirmed by patch testing. Moreover, there are only two reported cases showing a double sensitization to ranitidine and to other H2-receptor antagonists by patch testing after a delayed reaction due to ranitidine, the other being H2-receptor antagonists involving cimetidine and nizatidine, not famotidine.

Chronic occlusive arterial disease of the periphery is primarily caused by atherosclerotic disease. In young patients with no identifi able risk factors for atherosclerosis, who present with symptoms of claudication or critical ischemia, other rare causes need to be suspected. Cystic adventitial disease is one such condition affecting young healthy patients. Although it has been reported most commonly in relation to the popliteal artery, other sites including the iliac artery can also get affected. Isolated short segment stenosis or occlusion can lead to signifi cant disabling symptoms restricted to one side. Imaging studies show pristine arterial anatomy with no evidence of systemic atherosclerotic disease and an isolated area of luminal stenosis. Defi nitive treatment involves open surgical excision with interposition grafting for optimal long-term results. We report a case of cystic adventitial disease affecting the external iliac artery in an otherwise healthy young man. 

Background: The plant Artemisia annua has been used in traditional Chinese medicine for many years. Rich in bioactive molecules, the A. annua plant is used to extract the anti-malaria compound artemisinin (< 1%), which results in most of the plant being unutilized. One byproduct of artemisinin extraction is artemisia naphtha (AN), which has yet to be studied extensively. Aims: Study the activity of a novel AN oil extract against microbes, pro-inflammatory cytokines, and dermatological endpoints that are key for eczema and acne pathogenesis to determine if an effective A. annua extract for these skin conditions can be developed. Methods: Gas chromatography-mass spectrometry was performed to determine the composition of AN oil. P. acnes, S. aureus, M. furfur, and C. albicans were cultured to determine minimal inhibitory concentration. in vitro studies utilizing keratinocytes and macrophages were treated with AN oil and gene expression measured by quantitative RT-PCR. A 13-subject clinical trial was performed with 1% AN oil Gel to assess its potential benefits for sensitive and acne prone skin. Results: AN oil upregulates filaggrin gene expression and possesses antimicrobial and anti-inflammatory activity inhibiting LPS, S. aureus and "Th2 induced" pro-inflammatory mediator release (IL-6, IL-8 and TSLP). Clinical assessment of 1% AN Gel shows it reduces acne blemishes and the appearance of redness. Conclusion: Previously an underutilized and unpurified byproduct, AN is now the source to develop the first topical AN oil for cosmetic use with an activity profile that suggests it is effective for those with sensitive and/or acne prone skin.

Dissecting aortic aneurysm with ST segment elevation, and pulmonary embolism with ST segment elevation are two of a number of clinical entities which can simulate ST segment elevation myocardial infarction. Objective: The purpose of this review is to analyse clinical features in anecdotal reports of 138 dissecting aortic aneurysm patients with STEMI-like presentation, and 102 pulmonary embolism patients with STEMI-like presentation in order to generate insights which might help to optimise triage of patients with STEMI-like clinical presentation. Methods: Reports were culled from a literature search covering the period January 2000 to March 2020 using Googlescholar, Pubmed, EMBASE and MEDLINE. Reports were included only if there was a specification of the location of ST segment elevation and an account of the clinical signs and symptoms. Search terms were “ST segment elevation”,”aortic dissection”, “pulmonary embolism”, “myocardial infarction”, and “paradoxical embolism”. Fisher’s exact test was utilised for two-sided comparison of proportions. Proportion was calculated for each group as the number of patients with that parameter relative to the total number of patients assessed for that parameter. Findings: There were 138 patients with aortic dissection, 91 of whom were either fast-tracked to coronary angiography (81 patients) or fast-tracked to thrombolytic treatment (10 patients). There were 47 patients managed with neither of those strategies. There were 102 patients with pulmonary embolism, 71 of whom were fast tracked to coronary angiography, and 31 who did not receive that evaluation. Compared with their dissecting aortic aneurysm counterparts, those dissecting aortic aneurysm patients initially managed by percutaneous coronary intervention or by thrombolysis were significantly (p = 0.0003) more likely to have presented with chest pain, and significantly (p = 0.018) less likely to have presented with breathlessness. The preferential fast-tracking to coronary angiography prevailed in spite of comparable prevalence of back pain in fast tracked and in non-fast tracked subjects. Use of transthoracic echocardiography was also comparable in the two subgroups of dissecting aortic aneurysm patients. Pulmonary embolism patients fast tracked to percutaneous coronary intervention were significantly (p = 0.0008) more likely to have presented with chest pain than their pulmonary embolism counterparts who were not fast-tracked. The prevalence of paradoxical embolism was also significantly (p = 0.0016) higher in fast-tracked patients than in counterparts not fast-tracked. Cardiac arrest was significantly (p = 0.0177) less prevalent in fast-tracked pulmonary embolism patients than in pulmonary embolism patients who were not fast-tracked. Preferential fast-tracking to coronary angiography prevailed in spite of the fact that prevalence of documented deep vein thrombosis was comparable in fast-tracked subjects and in subjects not fast-tracked. The prevalence of use of transthoracic echocardiography was also similar in fast-tracked pulmonary embolism patients vs counterparts not fast tracked. Overall, however, transthoracic echocardiography had been utilised significantly (p = 0.007) less frequently in dissecting aneurysm patients than in pulmonary embolism patients. Conclusion: Given the high prevalence of STEMI-like presentation in aortic dissection there is a need for greater use of point-of-care transthoracic echocardiography to mitigate risk of inappropriate percutaneous coronary intervention(which might delay implementation of aortic repair surgery) and inappropriate thrombolysis(which might precipitate hemorrhagic cardiac tamponade) (75) during triage of patients presenting with ST segment elevation simulating ST segment elevation myocardial infarction (STEMI). Furthermore, during triage of patients with STEMI-like clinical presentation, the combined use of point-of -care echocardiography and evaluation for deep vein thrombosis will facilitate the differentiation between acute myocardial infarction, STEMI-like aortic dissection, and STEMI-like pulmonary embolism. Among STEMI-like patients in whom DAA has been ruled out by point of care TTE, fast tracking to PCI might generate an opportunity to identify and treat paradoxical coronary artery embolism by thrombectomy. Thereby mitigating the mortality risk associated with coronary occlusion. Concurrent awareness of PE as the underlying cause of paradoxical embolism also generates an opportunity to relieve the clot burden in the pulmonary circulation, either by pulmonary embolectomy or by thrombolysis. Above all, frontline clinicians should have a greater awareness of the syndrome of STEMI-like presentation of aortic dissection and STEMI-like pulmonary embolism so as to mitigate the risk of inappropriate thrombolysis and inappropriate percutaneous coronary angiography which seems to prevail even in the presence of red flags such as back pain (for aortic dissection) and deep vein thrombosis(for pulmonary embolism). 

Nucleic acid-based therapy has become an increasingly important strategy for treating a variety of human diseases. In systemic therapy, a therapeutic gene must be delivered efficiently to its target tissues without side effects. To deliver a therapeutic gene such as plasmid DNA (pDNA) or small interfering RNA (siRNA) to target tissues by systemic administration, cationic carriers such as cationic liposomes and polymers have been commonly used as a non-viral vector. However, the binary complex of therapeutic gene and cationic carrier must be stabilized in the blood circulation by avoiding agglutination with blood components, because electrostatic interactions between positively charged complexes and negatively charged erythrocytes can cause agglutination, and the agglutinates contribute to high entrapment of the therapeutic genes in the highly extended lung capillaries. One promising approach for overcoming this problem is modification of the surface of cationic complexes with anionic biodegradable polymers such as hyaluronic acid, chondroitin sulfate, or polyglutamic acid. As another approach, we recently developed a sequential injection method of anionic polymer and cationic liposome/therapeutic gene complex (cationic lipoplex) for delivery of a therapeutic gene into the liver or liver metastasis. In this review, we describe recent advances in the delivery of therapeutic genes by lipid- and polymer-based carrier systems using anionic polymers.

Since the discovery of the dystrophin gene (DMD gene) thirty years ago, several therapeutic approaches have been investigated to treat Duchenne muscular dystrophy (DMD). This includes cell therapy, exon jumping, exonic knockout, and the CinDel method. In this article, we present the challenges of developping a treatment for DMD and the advances of these various approaches. We included the new CRISPR-Cas9 system, which permits not only major progress in the development of new treatments based on genome editing but also the production of new animal models.

The Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome is the most severe form of congenital malformation of the inner female reproductive tract. It is diagnosed as such when the uterus, the upper vagina and optionally the Fallopian tubes are absent. It accounts for approximately 1 in 5000 live-born females and has been classified in two subtypes: type 1 in the presence of isolated uterovaginal aplasia and type 2 when associated in various combinations with extragenital malformations of the kidneys, skeleton, heart and auditory system. Most cases of MRKH syndrome are sporadic, although a significant number of many familial cases have been reported to date. Despite numerous studies, the genetics of the syndrome remains largely unknown and appears to be heterogeneous: chromosomal abnormalities and some candidate gene variants appear to be associated with a few cases; others have been suggested but not yet confirmed. To date, mainly the GREB1L gene appears to be a serious candidate. Among the remaining hypotheses, the controversial contribution of partial duplications of the SHOX gene is still puzzling, as the deficiency of this gene is a major cause of skeletal adysplasia syndromes. We have attempted to resolve this controversy in a study of 60 MRKH cases. Our results tend to show that SHOX duplications can be the origin of a genetic mechanism responsible for MRKH syndrome.

Background: The Islamic religion has emphasized the importance of health and well-being, and Muslims have recognized the value of a good and healthy life based on Islamic recommendations. Health-oriented lifestyle is a multi-dimensional phenomenon that is the purpose of this study to investigate the Islamic lifestyle. Methods: In this review study, we tried to explore practical strategies in Islam through access to credible sources in the form of a descriptive article on achieving a healthy lifestyle in nutrition. For this purpose, using keywords and electronic and manual searches in authentic Islamic and medical sources, information was searched and collected to answer the research question. Results: Based on the results of the reviewed studies, the guidelines of Islamic religion and beliefs are mainly based on improving lifestyle factors and dietary habits. It has been emphasized that adherence to the Islamic dietary guidelines and lifestyle, may lead to less risk of diseases. Conclusion: Given the availability of valuable nutritional resources and instructions in Islam to prevent and combat nutrition-related diseases, these theories can be applied and prevent from spreading and creating malnutrition-related diseases; the guidelines of Islam on healthy lifestyles in nutrition can be recommended to the world as a basic strategy

Background: Corona virus disease is a highly infectious disease caused by the newly innovated corona virus. An emerging respiratory disease was abbreviated as COVID-19, after it has been first reported in December 2019 in Wuhan city of China. Ethiopia Ministry of health initiated multidisciplinary approach to tackle COVID-19 of which awareness creation is the main. The aim of this study is to assess knowledge, practice and associated factors towards prevention of novel corona virus among clients in Debre Tabor general hospital, Northwest Ethiopia, 2020. Methods: Institution based cross sectional study design was conducted in Debre Tabor General hospital from May 15 to May 30, 2020. A structured questionnaire was used for data collection. The data were entered into epi data version 4.4 and exported to SPSS window version 25 for analysis. Binary and multivariable logistic regression was fitted. Odds Ratios with 95% Confidence interval and p - value ≤ 0.05 were considered to assert significance. Result: A total of 345 clients were analyzed and the response rate was 96.4%. The mean age was 32.95 with S.D ± 13.18 years. Majority of the respondents were male (75.7%). Among the study participants 54.2% with (95% CI: [49.0, 59.2%]) and 49.0% with (95% CI: [43.5, 53.4%]) have good knowledge and god practice on COVID-19 preventions respectively. Sex AOR: 4.33 (2.06, 9.09), family size AOR: 2.49 (1.01, 6.15 and heard from social media AOR: 2.78 (1.21, 6.39) were significantly associated with knowledge of respondents. Knowledge AOR: 3.11 (1.59, 6.10) was significantly associated with practice of clients. Residency and those heard from TV were significant variables for both. Conclusion and recommendation: In this study the overall knowledge and preventive practices of the respondents were found to be low. Sex, family size, residency and sources of information were associated factors for knowledge. In addition to this knowledge was significant factor for practice. Health education programs aimed at mobilizing and improving COVID-19 related knowledge and practice intend to be strengthened.

State Department had evacuated a number of Americans from the U.S. consulate in Guangzhou, China after they experienced unexplained health issues. A group of U.S. diplomats stationed in China have been brought back to the states after being inflicted by a mystery illness that reportedly resembles the brain injuries previously suffered by staff in Cuba. At the end of the December 2018 we have found a medicine fully treating the damages caused the Frey Effect of Microwave and other types of Sonic Weapons in Human’s internal, endogenous organs. I am proposing to use Naphasoline nitrate, (former) nasal decongestant, to treat Carcinogenesis of the Human’s internal, endogenous organs caused by Sonic Weapons through the release and cleaning of the Lymphatic ways in patients with colorectal, colon, pancreatic, breast, etc., cancer. I have proved this healing effect of the Naphazoline nitrate on myself during treatment in last months of the year 2018.

Nanotechnology is a smart technology in the field of biomedical engineering used for the diagnosis and treatment of diseases. Nanodrugs provide better encapsulation of drug and efficiency at low dosage to kill the targeted tissue/cells. However, the chances of chronic toxicity and high cost of treatment limits its applicability [1]. To overcome these problems still, the experts of the scientific community have been working on it, to design the best one and cost-effective treatment for the human welfare.

The Human three-dimensional (3D) musculoskeletal model is based on motion analysis methods and can be obtained by particular motion capture systems that export 3D data with coordinate 3D (C3D) format. Unique cameras and specific software are essential for analyzing the data. This equipment is quite expensive, and using them is time-consuming. This research intends to use ordinary video cameras and open source systems to get 3D data and create a C3D format due to these problems. By capturing movements with two video cameras, marker coordination is obtainable using Skill-Spector. To create C3D data from 3D coordinates of the body points, MATLAB functions were used. The subject was captured simultaneously with both the Cortex system and two video cameras during each validation test. The mean correlation coefficient of datasets is 0.7. This method can be used as an alternative method for motion analysis due to a more detailed comparison. The C3D data collection, which we presented in this research, is more accessible and cost-efficient than other systems. In this method, only two cameras have been used.

Advances in metagenomics have facilitated population studies of associations between microbial compositions and host properties, but strategies to minimize biases in these population analyses are needed. However, the effects of storage conditions, including freezing and preservation buffer, on microbial populations in fecal samples have not been studied sufficiently. In this study, we investigated metagenomic differences between fecal samples stored in different conditions. We collected 46 fecal samples from patients with lung cancer. DNA quality and microbial composition within different storage Methods were compared throughout 16S rRNA sequencing and post analysis. DNA quality and sequencing results for two storage conditions (freezing and preservation in buffer) did not differ significantly, whereas microbial information was better preserved in buffer than by freezing. In a metagenomic analysis, we observed that the microbial compositional distance was small within the same storage condition. Taxonomic annotation revealed that many microbes differed in abundance between frozen and buffer-preserved feces. In particular, the abundances of Firmicutes and Bacteroidetes varied depending on storage conditions. Microbes belonging to these phyla differed, resulting in biases in population metagenomic analysis. We suggest that a unified storage Methods is requisite for accurate population metagenomic studies.