Dark underarms may simply have to do with pigmentation and levels of melanin in the skin. But sometimes armpit discoloration ...

It can cause an armpit rash that becomes raw or cracks open, which can be itchy and very painful. Hormones are another possible culprit of armpit pain. “If you still experience menstrual periods ...

Trichomycosis is a bacterial infection of the underarm ... and can spread through bodily fluids like semen, vaginal fluids, ...