Intermittent menstruation for the first time after the end of menstrual cramps is considered to be due to abnormal hormone levels, poor uterine recuperation after delivery, pelvic inflammatory disease, and so on. 1. Abnormal hormone levels: most women need to breastfeed after giving birth, at this time the body’s lactin level is higher, which will affect the level of other hormones, such as progesterone and estrogen, and so on, and will cause abnormal menstruation. 2. Poor post-partum uterine recuperation: If there is some fetal membrane tissue or placental tissue in the uterine cavity that has not been discharged after delivery, it will lead to the stripping of the residual tissue from the uterine wall, and so it will also cause bleeding, which can be mistaken for menstruation by some people. 3. Pelvic inflammatory disease (PID): After giving birth, women with low immunity will lose their ability to defend themselves, which will easily cause infections of the reproductive organs causing pelvic inflammatory disease, resulting in abnormal vaginal bleeding, such as bleeding from sexual intercourse, bleeding between menstrual cycles, and so on. If you have intermittent menstruation for the first time after the end of menstrual discharge, you should go to the hospital for a detailed examination and symptomatic treatment for the cause of the disease.