I can understand your concern. Psoriasis can be brought into remission but cannot be completely cured. However dont lose heart and do not change your doctor frequently as it affects the treatment. The treatment of psoriasis basically depends upon the extent of involvement and response of the lesions to treatment. The treatment of psoriasis usually fails when patient's compliance with the medicine is poor. Multiple treatment options are available in the form of topicals (emollients, steroids, tacrolimus, tazarotene
etc), oral therapies( methotrexate
, acitretin, cyclosporine
etc), photo based therapies and biologicals. Now what is going to suit you can only be understood when one has elicited a proper clinical history and has examined your skin and scalp involvement. Secondly, it is also important to know, what medicines you have used till date and for how long to decide upon a proper treatment therapy. kindly consult a dermatologist
for same. Take care.