If an ovarian cyst is found four years after menopause, it is necessary to judge its nature according to the size of the cyst, imaging examination, tumor markers and the presence of clinical symptoms, and then adopt appropriate treatment methods, some under regular observation, and some needing surgery. 1. Regular observation: If the ovarian cyst is smaller than 5 cm and there are no uncomfortable symptoms, the doctor will judge that it has a high possibility of being benign, and in this case, it can be re-examined every three to six months, and does not need any special treatment. 2. Surgery: If the ovarian cyst is relatively large, accompanied by elevated tumor markers or symptoms such as abdominal pain or abnormal vaginal bleeding, laparoscopic or open surgery should be used to treat it, and pathological examination is needed to determine the benign or malignant nature of the mass after surgery. Once ovarian cysts are detected after menopause, one should consult a doctor in time, complete the relevant examinations, and take reasonable treatment under the guidance of a specialist.