What should you know about DHT and alopecia areata?

DHT is a hormone derived from testosterone and is associated with pattern hair loss in people with inherited follicle sensitivity. Alopecia areata is an immune-mediated condition in which the immune system targets hair follicles, often producing smooth, clearly defined patches. The two processes can look different, but a photograph or search phrase cannot establish the diagnosis.

Alopecia areata may affect scalp hair, eyebrows, eyelashes or other body hair, and activity can change over time. Review the condition overview for [Alopecia Areata](/conditions/alopecia-areata/) and note whether you have [Bald Patches](/symptoms/bald-patches/) or more diffuse [Hair Loss](/symptoms/hair-loss/).

A dermatologist may ask when the loss began, whether patches are expanding, whether nails have changed, and whether relatives have similar problems. They may examine the scalp and hair shafts and consider other causes of shedding. Do not start hormone-blocking or steroid treatment based only on the word DHT.

Treatment depends on the extent and activity of alopecia areata. Options can include [Steroid Injection Into The Skin](/treatments/injectables/intralesional-steroid-injection/), [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/), [Oral Corticosteroid Treatment](/treatments/medical-dermatology/oral-corticosteroid-therapy/) or [JAK Inhibitor Treatment](/treatments/medical-dermatology/jak-inhibitor-therapy/). A clinician should explain benefits, monitoring and alternatives for your situation.

Arrange a medical review for rapidly expanding patches, loss of eyebrows or eyelashes, scalp pain, marked scaling, pus, scarring or sudden widespread shedding. Seek urgent care for facial swelling, breathing difficulty or a severe reaction after treatment. Prompt assessment is also sensible when hair loss is accompanied by other new symptoms or is causing substantial distress.

Ask whether the pattern fits alopecia areata, pattern loss or another condition; whether the follicles show inflammation or scarring; which treatment is appropriate; what monitoring is needed; and what changes should trigger an earlier review.