At present, the etiology of nevus OTA is not very clear, but clinical summary and laboratory research show that nevus OTA is closely related to some hormones in human body. In addition, from the pathological manifestations of nevus OTA, it is caused by melanocytes staying in the dermis and secreting a large number of melanin particles. Melanin particles gradually deposited, resulting in the color of nevus OTA gradually deepened and became heavier and heavier. Because melanocytes are also affected by ultraviolet rays from the sun, if patients engage in outdoor work or do not pay attention to sun protection in summer, it will lead to further aggravation of nevus of OTA. Abnormal embryonic development, environmental pollution and other reasons.

Whatever the reason, it is recommended to go to the hospital as soon as possible, and the earlier the treatment, the better the effect. To treat birthmarks, we should choose a professional and regular hospital. Beijing 30 1 Hospital and Peking Union Medical College Hospital are all good. Chengdu Jinyi Hospital can go and have a look. Doctors from Beijing 30 1 Hospital, Peking Union Medical College Hospital and Beijing Badachu Plastic Surgery Hospital will also come to the hospital for consultation and exchange on a regular basis. Doctors have rich experience in diagnosis and treatment and have been invited to attend academic conferences at home and abroad for further study. The doctor will make a treatment plan according to the specific situation of the birthmark.