My wife has been having an unexplained rash under her breasts bilat and the left side of her neck. It looks like a heat rash, but we have tried OTC Benadryl/Hydrocortisone creams and Benadryl PO with no relief. We have also tried ice packs and baby powder to the affected areas with no resolution of the issue. There are a lot of small, heat rash like papules in these areas. My wife is African American and her skin tone is medium brown. There are an estimated 50-70 papules on her neck and similar amounts to the other areas (breasts). She has complained of itching to the affected areas, regardless of how much Benadryl or Hydrocortisone is used. She has no previous history with any rash and no STDs.

She has had this problem for approximately a month following a gallbladder removal surgery where she was on antibiotics. Again, we have tried OTC Benadryl and Hydrocortisone creams and Benadryl PO with no improvement as well as ice packs and baby powder. We are now wondering if this is a fungal infection and if so, what we can use OTC to treat it?