Abstract
Normal hair follicles display cyclical activity. Hair grows in the anagen phase, a transition phase known as catagen occurs after this, and finally hair enters a dormant phase known as the telogen phase. Dead hair falls off during later telogen or early anagen phase. On average scalp follicles undergo 10–30 cycles in a lifetime, with the replacement of every hair every 3–5 years. Approximately 86% of normal hair is in anagen phase, 1% in catagen, and 13% in telogen. It is estimated that on average, approximately 77 hairs are shed per day. Disruption of this hair cycle and concurrent loss of hair are indicative of telogen effluvium [3].
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Khan Mohammad Beigi, P. (2018). Telogen Effluvium. In: Alopecia Areata. Springer, Cham. https://doi.org/10.1007/978-3-319-72134-7_15
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DOI: https://doi.org/10.1007/978-3-319-72134-7_15
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