The monthly period is clinically known as the puerperium, there has been a lot of blood is considered to be normal postnatal malodor, but can not be ruled out is caused by other reasons. 1. Postpartum discharge: the puerperium under normal circumstances will appear, early mainly bloody, mainly bloody secretions, with the recovery of the endometrium and the improvement of the surface of the bleeding site gradually become less and less vaginal bleeding will also be reduced, part of the female recovery slower bleeding time is relatively long, the puerperium to the post-partum period of 42 days has been bleeding, if not persistent bleeding is a normal physiological phenomenon. 2. Other reasons: If the mother has endometrial inflammation, poor uterine recovery, meconium and placenta residue and other problems, may also cause puerperium has been bleeding symptoms, if the amount of bleeding is excessive, can reach or even exceed the amount of menstruation, need to pay attention to. If the bleeding during puerperium does not go away for a long time or even worsens, it is recommended to go to the hospital to find out the cause of the bleeding in time and treat it actively so as to avoid delaying the condition.