Published · Updated · SkinWise Clinic
Alopecia areata: assessing patchy hair loss and treatment options
Alopecia areata is an immune-mediated form of hair loss that often appears as a smooth patch. It can involve the scalp, eyebrows, eyelashes or other hair-bearing areas. Its course varies; a fixed regrowth promise or recurrence percentage cannot predict an individual’s experience.
A patch needs a diagnosis
Other causes, including infection and traction, can resemble alopecia areata. Describe how quickly it appeared and whether there is pain, scale, discharge or scarring. Nail changes and other affected areas may also be relevant.
The 2026 S3 diagnostic guideline addresses assessment and classification. It should not be confused with evidence for treating inherited pattern thinning. Blood tests are selected when the history and examination justify them.
What guides treatment?
The British Association of Dermatologists living guideline considers extent, activity, previous treatment and impact. Depending on those features, observation, topical or injected treatments, or selected systemic options may be discussed. Eligibility, safety screening and monitoring differ between treatments.
Ask what the proposed treatment is intended to achieve, what risks apply and what alternatives exist. Regrowth can occur, but recurrence or incomplete response is possible. Treatment choice should not depend on a guarantee of rapid restoration.
PRP research for pattern loss does not answer this question
The PRP evidence discussed in the hair-loss service guide concerns selected pattern-loss populations. It does not establish PRP as a standard treatment for alopecia areata. A different diagnosis requires its own evidence and discussion.
Prepare for review
Bring photographs showing the change, previous prescriptions and relevant reports. Mention how the condition affects you, including anxiety about eyebrows or eyelashes and any need for camouflage advice. These concerns are part of care.
Ask how response will be assessed, when to return and which changes need earlier contact. Pain, inflammation or scarring should prompt reassessment for other causes. The alopecia-areata overview and first-visit guide cover the next steps.