The dark forehead may be caused by hygiene and cleanliness factors, pigmentation, skin melanosis and other factors.
1. hygiene cleaning factors: patients usually hygiene cleaning is not in place, resulting in dust long-term residue in the skin, there will be forehead dark black symptoms.
2. pigmentation: patients in a long-term ultraviolet radiation is more intense environment, resulting in ultraviolet radiation for a long time to irradiate the skin will appear pigmentation of the situation, so that the forehead dark black.
3. Skin melanosis: usually due to the indiscriminate use of poor-quality cosmetics, drug stimulation, environmental factors such as irregular black pigmentation of the skin, there will be a dark forehead darkening symptoms, accompanied by itching.
Patients with long-term dark forehead blackening should go to the hospital for examination in a timely manner, after clarifying the specific causes of the disease, choose the appropriate method of treatment.