The yellow color of the discharge after half a month postpartum may be a normal phenomenon, especially in the late stage of discharge, when the color of the discharge is white or yellowish, consisting of a large number of white blood cells. However, it may also be due to endometritis, vaginitis and other pathological causes. 1. Normal phenomenon: the evil discharge refers to the endometrial shedding and blood mixing, discharged from the vagina, in the early stage of the evil discharge is mostly red, with the increase of the time of discharge, yellow secretion can appear, if there is no peculiar smell is a normal phenomenon. 2. Pathological reasons: generally for women with yellow post-partum discharge, accompanied by foul-smelling symptoms, mostly indicates the presence of reproductive tract infections, such as endometritis, vaginitis and so on. After the appearance of yellow postnatal discharge, no abnormal phenomenon can be observed, but for the accompanied by bad smell, abdominal pain, etc. It is recommended to consult a doctor in time to clarify the cause of the disease and then targeted treatment.