The “fringe sign” for public education on traction alopecia
Published Web Locationhttps://doi.org/10.5070/D31h81c7s1
The “fringe sign” for public education on traction alopeciaDivision of Dermatology, Red Cross Children's and Groote Schuur Hospitals, University of Cape Town Cape Town, Western Province,
Nonhlanhla P Khumalo FCDerm PhD
Dermatology Online Journal 18 (9): 16
The “fringe sign” introduced by Samrao and co-authors is a phenomenally descriptive catch phrase for translating study data for public education in the prevention of traction alopecia.
The manuscript by Samrao et al introduces a fantastically memorable clinical sign, the “fringe sign,” that’s likely to improve the recognition of traction alopecia (TA) . General population data on disease prevalence outside Africa have not yet been published, but clinic data have been reported . In our population mild-to-moderate TA is somewhat ubiquitous in females. The prevalence is higher in African schoolgirls than boys (17.1% vs. 0%); increases with age in girls [8.6% (6-7 years), 15.6% (10-15 years), to 21.7% (17-21 years)]; is higher in girls with relaxed vs. natural hair (22% vs. 5.2%) ; and is highest in adults (31.7% in women vs. 2.3% in men; with affected males more likely to wear cornrows and dreadlocks) . The risk of TA increases with symptomatic traction (pain, pimples, crusts) [odds ratio 1.98 (p: <0.022, CI 1.10 – 3.57)] and is highest in combined hairstyles i.e. traction (braids/weaves/locks) done on relaxed hair [odds ratio 3.47 (p: <0.001, CI 1.94 – 6.20)] . Rucker Wright et al  reported a high prevalence in a clinic population of African American girls (18% aged 5.4 – 14.3 years) as well as a TA risk that increased with traction and a history of relaxers (OR 5.27, CI 1.5 – 18.32, P = 0.009). Relaxers weaken hair by breaking down disulphide bonds significantly reducing hair strength  and hair length . Relaxer-induced hair damage is most notable in the hair furthest from the scalp. Protection of previously relaxed hair during repeat chemical processing may limit damage and warrants study. This hair breakage, a feature of trichorrhexic nodosa is worsened by hair dyes and heat  and improved by conditioning or appropriate moisturizers .
Although TA is most common in people with afro-textured hair, all hair phenotypes can be affected as demonstrated in this study in which 29 percent of patients were Hispanic. Two thirds of subjects in this study had histological examination; Samrao et al are to be commended because this contributes to understanding disease pathogenesis. The sequence is likely to be firstly traction folliculitis (not always clinically apparent) . In addition to retention of sebaceous glands  and increased catagen hair [1, 12], both decreased and increased telogen hairs have been reported as well as miniaturized follicles [1, 11, 13]. However, cases reported from dermatology clinics are likely to have more severe disease and there is as yet no published data on the histopathological spectrum of clinically graded mild to severe TA.
From examining large numbers of participants, TA appears to start with gradual but significant shortening of marginal hair (i.e. an early “fringe” without bald patches) equivalent to Marginal Traction Alopecia Severity Score (M–TAS) Grade 1–2 . This may suggest that traction initially induces follicular miniaturization. With progression bald patches appear but hair persists on the hairline as a separate “fringe”  equivalent to M–TAS 3–4 . The end stage on histopathology is progressive fibrosis. Longstanding TA is thought to be irreversible, although anecdotal regrowth has been reported . It would be useful to identify histological features that predict both the onset of permanent hair loss and response to treatment, which could start with controlled trials of topical minoxidil.
Data suggest that the pre-teen years are an ideal public education target for TA prevention. Although more research is required there is evidence for clear public health messages.
To avoid developing the “fringe sign”:
- Traction-based hairstyles should be painless – pain is an indication to undo the hair, not for damp scarves or aspirin.
- Traction hairstyles on relaxed hair should be avoided or done at least two weeks after processing – relaxed hair is weak and prone to breakage.
- Relaxers should be avoided especially in children – hair damage increases with exposure duration
- If used, relaxers should be applied according to package instructions, taking care to only process the new growth or “virgin hair” – no “smoothing” of the cream through previously relaxed hair. In addition, the hair should be thoroughly rinsed and neutralized after processing or immediately if scalp tingling or burning occurs.
- Using both relaxers and dyes compound hair damage; it should be avoided or done at least two weeks apart.
- Heat on relaxed hair should be avoided – air dry or use low-heat hairdryer settings. Hot combs and flat irons should be avoided or limited; their very high temperatures can cause significant hair damage.
- Conditioners and the use of non-occlusive petroleum-free moisturizers for dry hair may reduce the risk of hair breakage during grooming.
In spite of quantum leaps in many technologies, the active ingredients of relaxers have changed little since their legendary chance discovery a century ago by people such as Garrett Morgan . Further, available combs break afro-textured hair and induce “steady state” lengths . Not all traction is harmful; braids are a beautiful cultural art form that, with care, can be maintained without damage. As we spread the message of “no, to pain” and “no, to combined hairstyles” perhaps it is also time to call for the paradigm to shift out of the “relaxer box” – at least in its present form. There is a need for innovative development of “high-tech” combs and “novel products.” This could herald a new generation of Afro-textured hair care, without (or very limited) breakage of disulphide bonds that are so crucial for hair strength. With collaborative systematic effort, TA is a condition we certainly can eradicate.
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