Hi, As you said you suffer from psoriasis from long time. I would like to say you few things about psoriasis.Psoriasis is a chronic relapsing and autoimmune disease. It is a controllable disease. It is very difficult to cure totally.He may be having scaly plaques on various parts of the body,scaly lesions on the scalp. Exact cause is not known. Genetic tendency, autoimmunitity,stress,dry wheather...etc may be responsible for precipitation and exacerbation of the disease. You consult dermatologist for firm diagnosis and treatment. I usually recommend cap acitretin 10 mg twice a day along with methotraxate 15 mg weekly in three devided doses 12 hourly.Folic acid may be taken if there is oral ulcers. All this may be taken for long time till good response. Blood tests may be done to monitor the treatment. You may apply mild steroid cream or calcipotriol oint. on the lesions. You may apply moisturiser to improve the skin texture. You should avoid soap bath for few weeks. And also you should avoid stress and worries as that might worsen psoriasis.You might get good result after few months treatment.I hope you got my answer. Thanks. Dr. Ilyas Patel MD