Itchy rash on entire body excluding back and stomach. Hands, feet, cheeks have bumps. Comes and goes. Has had it about a week now.

Hives. A recurrent rash that comes and goes within 24hrs is hives. Try an OTC antihistamine to manage symptoms. It's likely to go away on its own but see if you can link it to possible allergic causes such as new meds or foods like milk, eggs wheat, soy, nuts and sea foods. Viral infections are also a likely and transient cause.