Why do I have a rash on my back and face? My rash on my back is itchy, and splotchy. My rash on my face is just bumps and not red (clusters)

Acne? There are a wide variety of reasons for a rash, including acne, allergy, infections. Symptoms like these are best determined by a thorough evaluation by your physician. Based on the findings, a treatment plan can be developed to help you.
I don't know. These lesions would need to be examined, a history obtained & other tests may be necessary in order to diagnose them. Usually the lesions needs to be identified to determine the solution.