My father is suffering forming psoriasis from last 20 years but the white patches on skin are controlled through diet, it is observed from last 2 years that his platelet count is ranging from 40,000 to 60,000 not more than that. So can you please advice what diagnosis should be done and which specialist should be consulted. Please also note he did not have any serious problems because of low platelet count but I am concerned because recently his cbc showed 25,000 platelet count.