Periorbital hyperpigmentation (dark circles behind the eyes) is a very prevalent disorder that can affect people of all ages. It is defined as a uniform, circular darkening of the skin around or under both eyes (blue to dark brown or black color). Increased pigmentation (melanin), loss of fatty tissue in the eyelid or surrounding the eye, swollen eyelids, bulging fat and muscle loss, and other factors can all contribute to the dark appearance. It can be difficult to treat the appearance.
Dandruff is a common scalp ailment that causes microscopic flakes of dry skin to flake from the scalp. You may detect flakes in your hair or on your shoulders if you have dark hair or wear dark colors. Dandruff might also irritate your scalp.