Hello, I just recently spent 3 weeks in a very tropical humid place. Toward the end of my vacation I delevoped what I believe is a heat rash on my stomach and up to the area just under my breasts. They are itchy and there are multiple little red bumps, they bleed if I scratch them too hard. I ve used hydrocortisone cream for two weeks and there has been no change. Is this a heat rash or could it be something else? Never had this before. Thank you for your advice.