Skin Rushes and Allergies

Patient: Hello Doctor,I am having skin rashes which looks like skin allergy from last one week or so. It is removing from one place of the body and growing up on another place the next day. Any idea why this is happening? I have never had this kind of things before. What medicines should I take to get rid of this? Please see the attached image of my left hand.

Skin Rushes and Allergies-1