Initially there is itching in private areas and now spreaded in full body (mainly lower body). When I lightly scratch the itching area my skin pilled off. Now because of this itch increases between leg fingers and skin become different like some open pimple open skin. Also on hand fingers there some waterry small small puffy pimples  like things . Hair fall is happening and dandruff also present. And also feeling lazy full day (My diet is very good) Please tell me the initial steps should be taken to treat these and please tell me what tests should I do?