Hyperpigmentation (skin that is darker than the surrounding skin) in the underarms can have several causes. Acanthosis nigricans (AN) is a common cause. AN causes thicker, darker, often velvety ...

Dark underarms are a completely normal occurrence. In fact, certain areas of the body, such as the groin and underarms, naturally tend to be darker than the surrounding skin due to increased friction ...

Dark spots, stubborn patches, uneven tone — hyperpigmentation shows up in many ways and for just as many reasons. If you’ve ever wondered why some areas of your skin seem to darken out of nowhere (or ...

The mirror reflection reveals a common but rarely discussed cosmetic concern—darkened underarm skin that contrasts with surrounding areas. This hyperpigmentation affects individuals across all skin ...