Poor uterine contraction will cause the following effects: 1, there will be more than vaginal bleeding, which may lead to bleeding or even hemorrhage and endanger the patient’s life, so it is necessary to give timely and appropriate treatment to promote uterine contraction to reduce the possibility of bleeding. 2, may lead to infection, because the uterus does not contract well, there will be bleeding, the uterus is very difficult to close the mouth, which can lead to the retrograde infection of pathogenic bacteria into the uterine cavity and lead to endometritis or pelvic inflammatory disease, which can cause serious infection symptoms and may even cause sepsis. This can lead to endometritis or pelvic inflammatory disease, which can cause serious infections and even sepsis. In the case of poor uterine contraction, actively promote uterine contraction, to prevent infection, strengthen the local care of the vulva, change sanitary napkins diligently, to reduce pathogenic bacteria infection.