The effect of laser treatment of nevus of OTA is ideal, but to achieve better effect, it usually needs 2-5 treatments, and the interval between each treatment is 1-2 months. Each treatment of nevus of OTA can be completed in a few minutes to dozens of minutes. The patient felt that the skin was slapped by pulsed light beam, and the pain of nevus of OTA disappeared quickly after laser treatment. The national toll-free number of the Laser Plastic Surgery Center of Beijing Navy General Hospital is 4008902088 (Dr. Yan Xiaohui solemnly reminds me that I can't fully understand the condition because I can't meet the patient face to face. The above suggestions are for reference only. Please go to the hospital for specific diagnosis and treatment under the guidance of a doctor! Yan Xiaohui Navy General Hospital/