I had consulted a doctor on practo and they prescribed me a coal tar shampoo, a salicylic acid solution and calcium for my treatment of scalp psoriasis. They also advised not to oil my hair. I first stopped oiling my hair for a week and that seems to have worked for me (probably for a short while, but my scalp is clear now). Please advise if I should go ahead with the prescribed treatment or it's fair to wait until the need arises.