1, some inflammatory skin diseases, such as dermatitis and eczema, will produce local pigmentation after inflammatory reaction. This situation needs time to fade away, which may be half a year or a year. You can usually use some whitening skin care products, such as vitamin E cream, or take vitamin E or vitamin C orally for whitening treatment.

2. Some congenital pigmentation can be treated by blackening laser.

3. Another situation is that some visceral diseases can cause melanosis of skin. In this case, it is necessary to actively treat the primary disease of internal organs. Only when the primary disease is well controlled can this pigmentation slowly fade away.