If amenorrhea at the age of 55 reappears with uterine as well as vaginal bleeding, it may be due to endocrine disorders, endometrial cancer, cervical diseases, etc., which need to be analyzed specifically. 1. Endocrine disorders: after menstruation stops, the ovaries can still secrete a small amount of estrogen, which will stimulate the endometrium. If there is endocrine disorder and excessive release of estrogen, it may lead to endometrial hyperplasia and shedding, which will be manifested as abnormal bleeding. 2. Endometrial cancer: if malignant lesions occur in the endometrium, it will also manifest as abnormal bleeding, at this time, it is necessary to keep vigilance, and once found, actively treat it. 3. Cervical disease: if there is cervicitis, cervical cancer, etc., when having sex after menopause, it will stimulate the cervix locally, leading to abnormal bleeding in the reproductive tract. If a woman has abnormal bleeding after menopause at 55 years old, there may be other reasons, and she needs to go to the hospital in time, and under the guidance of the doctor to carry out reasonable treatment to promote the relief of uncomfortable symptoms.