Menstruation after 2 years of menopause is not necessarily cancerous, but may be related to endocrine disorders and polyps. 1. Endocrine disorders: after 2 years of menopause, the level of estrogen and progesterone in the body gradually decreases due to the decrease of ovarian function. If the ovary is affected by certain diseases and still has the function of secretion of estrogen, it can still stimulate the endometrium to proliferate, and then a small amount of vaginal bleeding will occur. 2. Polyps: If patients have endometrial polyps and cervical polyps, abnormal uterine bleeding is the main clinical manifestation. 3. Endometrial cancer: For postmenopausal women, if vaginal bleeding occurs, endometrial cancer should be excluded first. For postmenopausal women who have menstruation for 2 years, it is suggested that they should go to gynecology department of regular hospitals to improve ultrasound and other relevant examinations to clarify the cause of the disease and then treat it actively.