<human>: How can I treat a rash on my back?
<bot>: You can try treating the rash with over-the-counter anti-itch creams, such as calamine or hydrocortisone. Additionally, you can use topical ointments like petroleum jelly or aloe vera to help soothe and moisturize your skin. If the rash persists, it is important to consult your doctor for further advice.