Painless abortion has certain risks, so it is recommended that women should take good contraceptive measures and try not to do painless abortion. Common complications include bleeding and abortion syndrome: 1. Bleeding: manifested by long duration of vaginal bleeding and bright red color of bleeding. It is recommended to seek medical attention in time to clarify the cause of bleeding and carry out hemostatic treatment. 2. Abortion syndrome: refers to a series of symptoms such as nausea and vomiting, dizziness, chest tightness, shortness of breath, pallor, profuse sweating, cold extremities and irregular heart rhythm in a few women during abortion surgery, and in severe cases, fainting, convulsions and shock may occur. It is recommended that the patient’s mental tension be lifted before the operation, and the operation be standardized during the operation to avoid the occurrence of abortion syndrome. The treatment mainly involves intravenous injection of atropine or scopolamine to relieve symptoms; 3. Drug allergy: some pregnant women reject abortion drugs or anesthetic drugs and develop drug allergy, or even anaphylactic shock in severe cases. The application of such drugs should be stopped in time and anti-allergy drugs should be given; 4. Endometrial injury: If the patient does not tolerate during the operation or the operation is not standardized, it is easy to have postoperative uterine adhesions, cervical canal adhesions, menstrual disorders and tubal blockage, etc. In serious cases, it can lead to secondary infertility, uterine perforation, incomplete suction, etc. After painless abortion, you should pay attention to rest, forbid sex and bathing for one month, avoid strenuous exercise, avoid spicy and stimulating food, pay attention to keep warm and avoid getting cold. After the painless abortion, you need to review the gynecology and ultrasound after one week to clarify the recovery of the uterus.