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

The dark, shadowy underarms that result when you shave ... especially if you tend to sweat heavily or you wear tight clothing. Also, because the underarms have folds, this can lead to trapped ...

Sweating from primary hyperhidrosis occurs where these glands are located. It usually affects one or two specific areas, such as the underarms, hands, feet, or face. This is why it’s labeled ...