Treatment is not very successful, but evidence-based ones include:
Localised areas: Dermovate or equivalent under occlusive dressing (frequently causes folliculitis)Intralesional steroid injection.
Extensive hair loss: Contact sensitisation/immunotherapy (offered by specialist centres only).
Also, make sure to offer wig on NHS if extensive, and psychological support – support group if poss. Fortunately, the prognosis for localised alopecia areata of less than one year’s duration is good – 80% will resolve spontaneously.
(Pulse on-line learning module)