Eczema and bacterial or fungal infections may cause a rash under your breasts. Treatment for rash under your breasts may involve home remedies, medications, and antiperspirants. Signs of breast cancer ...
Chemo rash is a common side effect of chemotherapy, caused by damage to rapidly dividing skin cells. Types include maculopapular, papulopustular, acneiform, erythema multiforme, and purpura rashes.