Ovarian teratoma pain 20 days after surgery may be caused by over fatigue, infection, adhesion and other reasons. 1. Overfatigue: if patients do not pay attention to rest after ovarian teratoma surgery, resume work too early or overfatigue, it may lead to the occurrence of ovarian teratoma pain 20 days after surgery. 2. Infection: if the patient does not take good care of the wound after the operation, or the body is weak, the pathogenic bacteria are easy to invade, triggering inflammation, there may also be the case of ovarian teratoma pain 20 days after the operation, the patient may also have fever and other symptoms. 3. Adhesion: postoperative adhesion of local tissues can also cause patients to experience pain 20 days after ovarian teratoma surgery. If patients have ovarian teratoma pain 20 days after surgery, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or standardized treatment.