After the birth of a baby, the contraction of the uterus will cause stomach pain. The pain during the contraction of the uterus is related to the number of babies born. If the pain is accompanied by an increase in the amount of malodorous fluid, or if the malodorous fluid has a bad smell, you need to have an ultrasound examination in time. If the pain is physiological, you can massage the uterus to promote contraction and reduce the pain. If there is an inflammatory infection in the uterine cavity, you need to treat it with anti-inflammatory drugs to control the development of the disease. During this period, you should pay attention not to overexert yourself, pay attention to bed rest, and do not eat spicy and stimulating food.