Black pigmentation next to the lips belongs to hyperpigmentation, and common causes include perioral dermatitis, melanosis, solar dermatitis and so on.
1. Perioral dermatitis: the etiology of this disease is unknown, and may be related to long-term use of glucocorticoids, fluoride toothpaste and other factors related to stimulation, manifested as pimples, herpes, scales, melanosis and other symptoms.
2. Melanosis: this disease can be caused by long-term use of cosmetics, sun exposure, contact with anthracene, naphthalene photosensitive substances, B vitamin deficiency and other factors, manifested as small pigment spots around the local hair follicles and other symptoms.
3. Solar dermatitis: this disease is mainly due to long-term exposure to sunlight, resulting in increased local melanin secretion, triggering hyperpigmentation caused by the skin next to the lips can appear to have melanin deposits.
It is recommended that patients according to their own situation, reduce the stimulation of cosmetics, usually do a good job of sunscreen, reduce skin pigmentation, if necessary, can go to the regular hospital dermatology consultation and treatment, to find out the cause of the problem, and comply with the doctor’s instructions for treatment.