TLDR Tight hairstyles can cause temporary or permanent hair loss, with less hair seen under a microscope in later stages.
Traction alopecia is a form of mechanical, traumatic hair loss that is usually mild and chronic, often resulting from hairstyles that involve tight braiding or banding of the hair. It is most common among African-American girls but can affect individuals of all races. The condition can initially cause temporary hair loss with possible regrowth, but if excessive traction continues for years, it may lead to permanent hair loss. Histologically, acute traction alopecia shows an increase in catagen/telogen hairs and normal follicular numbers, while end-stage disease is characterized by a marked reduction in the total number of terminal hairs, with vellus hairs remaining in normal numbers and no significant inflammation. The document suggests that traction alopecia is not solely caused by mechanical factors and that an immune-mediated mechanism is unlikely in its pathogenesis. The histological findings differ between early, reversible stages and permanent, "burnt out" stages of the condition.
27 citations,
September 2008 in “British Journal of Dermatology” Traction may not be the only cause of cicatricial marginal alopecia.
122 citations,
April 1995 in “Journal of Cutaneous Pathology” The document describes how to tell different types of non-scarring hair loss apart by looking at hair and scalp tissue under a microscope.
13 citations,
July 1973 in “Archives of dermatology” Tight cornrow braids may cause hair loss.
19 citations,
December 2001 in “Dermatologic Therapy” Horizontal scalp biopsy sections are better for diagnosing alopecia areata, showing fewer hair follicles and more miniaturized hairs.
3 citations,
November 1999 in “Journal of Cutaneous Medicine and Surgery” Examining scalp biopsies in different ways helps better diagnose hair loss types.
90 citations,
June 2006 in “The American Journal of Dermatopathology” The document concludes that accurate diagnosis of different types of hair loss requires careful examination of hair and scalp tissue, considering both clinical and microscopic features.
21 citations,
May 1996 in “Current problems in dermatology” Detailed patient history and physical exams are crucial for diagnosing hair loss.
1 citations,
December 2010 in “InnovAiT” The document concludes that accurate diagnosis and appropriate management are crucial for treating various hair disorders, which have significant psychological impacts.