I am experiencing rash on back. the following also describe me: skin rash and skin redness or irritation. what should i do?

Details: It is hard enough to diagnose a skin condition even with an exam, it is impossible to provide a guess when there is so little information. We need to know the duration, the appearance, the character (itching , burning etc) of the rash. We also need to know what kind of medications or supplements you are on. Can you provide us with these info.?