Pressure Alopecias: A Review

July 2023 in “ Journal of the American Academy of Dermatology ”

Eduardo Corona-Rodarte, Luis Enrique Cano-Aguilar, Luisa Fernanda Baldassarri-Ortego, Antonella Tosti, Daniel Asz-Sigall

pressure-induced alopecias ischemic obstruction capillaries type 1 PA type 2 PA vascular occlusion-induced alopecia erythema swelling tenderness scarring topical minoxidil corticosteroids Rogaine

Studysummary This review reports that pressure-induced alopecias, occurring from ischemic pressure, are often reversible without treatment if diagnosed promptly, but prognosis varies with severity and treatment timing.

Our plain-language summary. Not medical advice or a treatment recommendation. Consult a qualified healthcare professional before changing treatment. Full disclaimer

Pressure-induced alopecias (PAs) are rare hair loss conditions caused by ischemic obstruction of capillaries, with two main types: type 1 PA from prolonged external pressure (e.g., surgeries) and type 2 PA from cosmetic procedures with injectables. Differentiating type 2 PA from vascular occlusion-induced alopecia is important. Symptoms include erythema, swelling, tenderness, and sometimes just hair loss. Severe cases may lead to scarring. Early diagnosis is crucial to prevent complications, and while hair regrowth is common, the prognosis depends on ischemia severity and timely treatment. The effectiveness of treatments like topical minoxidil and corticosteroids remains unclear.

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