For past two weeks I have experienced red, itchy small bumps under armpits and across upper chest. First tried lotion. Then saw primary physician who recommended critical asteroid over counter topical. Five days application now and itch and redness persist. Male Caucasian, age 74, no known allergies. No recent changes in diet, bathing supplies, clothing apparel or other sources. Did have antibiotics for cataract surgery and colonoscopy but believe rash onset preceded both procedures. No fever, nausea, chills or other symptoms. Thanks in advance. Wayne