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

Age spots are areas of hyperpigmentation that appear on skin ... such as the backs of the hands and the tops of the feet, as well as the face, back, shoulders, and arms. They can be freckle ...

TikTokers are going viral recreating the ‘hyperpigmentation’ meme, amassing millions of likes and views on their videos.