{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T03:01:41Z","timestamp":1783652501687,"version":"3.55.0"},"reference-count":17,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2021,11,6]],"date-time":"2021-11-06T00:00:00Z","timestamp":1636156800000},"content-version":"vor","delay-in-days":5,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Dermatologic Therapy"],"published-print":{"date-parts":[[2021,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>COVID\u201019 is a febrile, infectious illness that has previously been associated with telogen effluvium (TE). However, to date, no study has been conducted to determine the incidence of TE in those who have had COVID\u201019. To assess the frequency of TE in post\u2010COVID\u201019 patients and the correlation between the development of TE and the severity of COVID\u201019, to understand whether emotional stress or medications are responsible for the development of TE. Totally 204 patients with a history of SARS\u2010CoV\u20102 infection in the last 3\u00a0months were included in the study. The diagnosis of TE was made by history of excessive hair shedding, hair pull test, diffuse or bitemporal thinning, and absence of anisotrichosis in trichoscopy. Patients who did not have any TE cause other than COVID\u201019 and whose hair loss started after COVID\u201019 were considered as \u201cCOVID\u201019 associated TE (CATE).\u201d We found TE in 75 (36.7%) cases and androgenetic alopecia (AGA) in 85 (41.7%) cases. CATE was present in 27.9% of cases and developed on average 53.76 (\u00b1\u200923.772) days after COVID\u201019 real\u2010time reverse transcription polymerase chain reaction (RT\u2010PCR) positivity. The proportion of patients with CATE was numerically higher in hospitalized patients compared to outpatients (31.7% vs. 24.3%; <jats:italic>p<\/jats:italic>\u00a0=\u00a00.238); and significantly higher in women compared to men (42.3% vs. 6.2%; <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), in patients with hypertension compared to those without hypertension (40.4% vs. 23.1%; <jats:italic>p<\/jats:italic>\u00a0=\u00a00.014), and in patients who had respiratory symptoms compared to those who had not (31.7% vs. 14.0%; <jats:italic>p<\/jats:italic>\u00a0=\u00a00.021). The patients with and without CATE were similar in terms of stress level and usage of COVID\u201019 medications. Patients with AGA had a higher rate of hospitalization (69.4% vs. 35.3%; <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) and a higher incidence of fever (69.4% vs. 54.6%; <jats:italic>p<\/jats:italic>\u00a0=\u00a00.033) during COVID\u201019, compared to those without. TE developed in approximately one\u2010quarter of people who have had COVID\u201019, and our study is the first to detect it. The time to onset of CATE, which was 7\u20138\u2009weeks after the SARS\u2010CoV\u20102 RT\u2010PCR positivity, was not much different from post\u2010infectious TE. Patients with severe COVID\u201019 seem to be more prone to develop TE. The presence of AGA is associated with a more severe COVID\u201019. During the pandemic, clinicians should consider a previous SARS\u2010CoV\u20102 infection in patients presenting with hair loss.<\/jats:p>","DOI":"10.1111\/dth.15175","type":"journal-article","created":{"date-parts":[[2021,10,28]],"date-time":"2021-10-28T02:45:39Z","timestamp":1635389139000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":44,"title":["<scp>COVID<\/scp>\u201019 induced telogen effluvium"],"prefix":"10.1155","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5207-9633","authenticated-orcid":false,"given":"Hasan","family":"Aksoy","sequence":"first","affiliation":[{"name":"Department of Dermatology Istanbul Medeniyet University Prof. Dr. Suleyman Yalcin City Hospital  \u0130stanbul Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Umut Mert","family":"Y\u0131ld\u0131r\u0131m","sequence":"additional","affiliation":[{"name":"Department of Dermatology Istanbul Medeniyet University Prof. Dr. Suleyman Yalcin City Hospital  \u0130stanbul Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P\u0131nar","family":"Ergen","sequence":"additional","affiliation":[{"name":"Department of Infectious Diseases and Clinical Microbiology Istanbul Medeniyet University Prof. Dr. Suleyman Yalcin City Hospital  \u0130stanbul Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mehmet Salih","family":"G\u00fcrel","sequence":"additional","affiliation":[{"name":"Department of Dermatology Istanbul Medeniyet University Prof. Dr. Suleyman Yalcin City Hospital  \u0130stanbul Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,11,6]]},"reference":[{"issue":"5","key":"e_1_2_8_2_1","article-title":"Telogen effluvium: a review of the literature","volume":"12","author":"Asghar 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