What causes black forehead?

Forehead blackening is more common in people who don't pay attention to skin care at ordinary times, local pigmentation caused by prolonged exposure, dry, rough, dark and blackened skin caused by skin cleaning and moisturizing, pigmentation caused by inflammation caused by infectious skin diseases, and long-term use of skin care products and ointments containing hormones will also cause forehead blackening. Clinically, it should be diagnosed and treated according to the characteristics of the disease and skin lesions. Pay attention to skin care, if caused by other diseases, should actively treat the primary disease, can effectively improve the symptoms of forehead blackening. The above health science knowledge is for reference only, the specific situation needs to be checked in a regular hospital, judged by a professional doctor.