Conversation: The conversation between human and AI assistant.
[|Human|] My friend is in south africa he has skin problem for the last 4 years. at hands ears,some part of the face also. He seems scratch the skin and some white powder like skin comes out leaving somes red rashes.he has been taking medication but not useful.doctor says it is one type soroisis.what medicine he should takepl suggest
[|AI|]  Hello. Thanks for writing to us at Chat Doctor Psoriasis presents as red, scaly, itchy patches at various body sites; commonly extensors like knee, elbow, scalp, hands. Facial involvement is less common but may involve the hair line, that may extend on to the adjacent facial skin. Diagnosis of psoriasis is clinical; skin biopsy may be confirmatory in doubtful cases. Psoriasis is a steroid responsive dermatitis and treatment of limited disease includes potent topical steroids e.g. clobetasol propionate clobetasol propionate in cream/point/lotions. Topical vitamin D analogues e, g calcitriol, calcitriol are also among the treatment options. Systemic treatment may be started in those who have widespread Or severe involvement (e.g. pustular psoriasis, erythrodermic psoriasis). Systemic treatment options include methotrexate, cyclosporine, phototherapy etc. Methotrexate sometimes may also be started in those with limited involvement e.g. recalcitrant involvement of hands and feet. Psoriasis is chronic and can recur after seemingly complete cure. Factors that are known to exacerbate psoriasis include Chat Doctor.