Yeast Infections Your armpit rash may be caused by a yeast infection (candidiasis). Yeast naturally live on your skin. However, they thrive and overgrow in warm, damp places, so this type of infection ...

These microscopic infections, which come from the same family of organisms as mushrooms, mould and yeast ... itchy rashes, usually in crevices like the buttocks, genitals and armpits.

Instead, it can be blended with a carrier oil (e.g., olive or almond) and placed on externally infected skin to treat a yeast infection in the armpit or groin, for example. A 2016 study found that ...