What should you know about brow hair loss?

Loss may affect one brow or both, the inner brow or tail, or occur as smooth patches. Clues include itch, scale, redness, broken hairs, scalp changes, or loss of lashes. Possible explanations include [Alopecia Areata](/conditions/alopecia-areata/), [Traction Alopecia](/conditions/traction-alopecia/), [Scalp Ringworm](/conditions/scalp-ringworm/), [Telogen Effluvium](/conditions/telogen-effluvium/), and pattern hair loss. Brow thinning is a symptom, not a diagnosis.

Pause waxing, threading, plucking, and harsh brow products while the skin settles. Avoid scratching and take clear photographs to compare the shape over time. A clinician may inspect hairs and skin, review illnesses and medicines, and order tests when a thyroid, nutritional, hormonal, or inflammatory cause is possible. Do not start hair medicines on your own; [Finasteride Treatment](/treatments/hair-restoration/finasteride-therapy/) is not appropriate for everyone and requires medical discussion.

Arrange a dermatology visit for sudden patchy loss, continuing shedding, scarring, pain, crusting, pus, or changes affecting lashes and scalp. Seek prompt care for facial swelling or a rapidly spreading infection. A new or persistent pattern of [Hair Loss](/symptoms/hair-loss/) is easier to assess before repeated cosmetic removal obscures the skin.

Ask whether the follicles look inflamed or scarred, which tests are useful, whether grooming should stop, and when regrowth or treatment response should be reviewed.