Ten days after delivery, if there is sudden and heavy bleeding, it is often caused by the following reasons: 1. Due to the residual placenta and fetal membranes. When about ten days after delivery, large amount of bleeding is caused by the opening of blood sinus due to the detachment between the residual tissues and the uterine wall. Clinically, you must go to the hospital as soon as possible to give treatment, on the one hand, to stop bleeding and on the other hand, to clear the uterus as soon as possible. The residual tissues will be cleared out and the uterus will contract so that there will be no more bleeding. 2. The possibility of sudden massive bleeding due to eating a lot of tonic products after delivery, such as ginseng and antler. So it is recommended that you also need to go to the hospital for examination and give to promote the contraction of the uterus so that the blood sinuses will close and the bleeding will be reduced.