The reason why menopause comes back after 4 months is considered to be related to perimenopause, medication and disease factors. 1. Perimenopause: If a woman is in perimenopause, she will have unstable menstruation at this time, which is a normal performance, mainly related to the unstable hormone levels in the body, and with the passage of time, the level of estrogen in the body decreases, and then the menopause will be completely stopped. 2. Drug factors: some women may use estrogen replacement therapy after menopause, because the long-term application of estrogen drugs may make the body’s hormone levels change, and then there will be symptoms of menstruation. 3. Disease factors: the reason why menopause for 4 months and then come back, also does not exclude and disease factors, such as the presence of patients with inflammation of the reproductive tract, tumors and other related diseases, may also cause the local mucous membrane to appear erosion bleeding, there will be vaginal bleeding symptoms. If you have stopped menstruating for 4 months, you should cooperate with your doctor to clarify the specific reasons and give targeted treatment and therapy.