It is normal to have more menstrual periods for the first time after the birth of a child. It is recommended to pay attention to rest during menstruation and to keep the vulva clean to avoid infection. If the menstruation is still more than 1/3 of the previous period, it is an abnormal phenomenon. The common reasons are as follows: First, the endometrium has become diseased, which will lead to increased menstruation, such as inflammation of the endometrium, or polyps of the endometrium, or cancer of the endometrium, which may lead to increased menstruation. Second, endocrine disorders, such as estrogen secretion is relatively low, after the menstruation, the endometrium can not be repaired as soon as possible, the blood sinus open to make the menstrual volume relatively increased, only after the examination to understand the cause of the disease and then give drug treatment.