Uterine infections after the onset of labor can have symptoms of fever, pain, and abnormal malignant discharge. Uterine infections include acute endometritis and myometritis. The pathogen invades through the abruptive surface of the placenta and spreads to the metaplastic layer of the uterus, so it leads to endometritis. If the pathogen invades the myometrium, it is called myometritis, and sometimes both can occur together. In the case of endometritis, the endometrium becomes congested and necrotic, and there is a large amount of purulent discharge with a foul odor inside the vagina. In the case of myometritis, there is abdominal pain, increased and purulent discharge, and pressure on the abdomen with pain in the uterus. There may also be incomplete uterine regeneration, which means that the uterus does not shrink as normal. Sometimes it may be accompanied by high fever and headache, and the blood test may indicate a more pronounced increase in white blood cells.