red spot in skin through out the body, what can be done?

The problem persists for last 2 months. There is red-red spot in my whole body except face palm etc. After consulting skin specialist and prescribe soap and lotion, it is now turning black and dry skin forms. After removing that dry part there is some wound kind of things appeared. And now again fresh red spot is occurring. There is no such iching prblm but the hole bole colours seems to be changing. Can you suggest something that can help me.