The darkening of the face is considered to be caused by excessive exposure to ultraviolet rays, skin melanosis, and medication.
1. Excessive exposure to ultraviolet rays: prolonged exposure to the sun promotes the formation of melanin, which increases the size and number of pigment cells and darkens the face.
2. Skin melanosis: frequent contact with photosensitive substances, such as tar and its derivatives, daily use of poor-quality cosmetics in the mineral oil, in the sun exposure, exposed skin is prone to melanosis, in addition to malnutrition, vitamin deficiency, endocrine disorders, etc. will cause hyperpigmentation, the emergence of gray-purple lattice-like hyperpigmentation spots.
3. Drugs: Some drugs can also lead to skin pigmentation, such as glucocorticoid coating drugs, birth control pills can cause changes in hormone levels in the body to increase melanin, long-term use of chlorpromazine and other drugs will appear hyperpigmentation, mainly in the exposed parts of the more obvious.
Face black may have other reasons, it is recommended to go to the hospital in a timely manner, after a clear diagnosis for the cause of the symptomatic treatment, should be strictly comply with the doctor’s instructions to use drugs, not random use of drugs, usually pay attention to do a good job of sunscreen, to maintain a healthy lifestyle. All of the above mentioned drugs must be used under the guidance of a doctor.