After pregnancy, due to the relative weakness of pregnant women, abdominal discomfort may often appear, which can be caused by physiological factors or pathological factors, and the common causes are as follows: 1. Physiological factors: 1. Early pregnancy reaction: abdominal discomfort in early pregnancy may be the early pregnancy reaction caused by the increase in the level of hormones in the body of pregnant women; 2. Uterine compression: in the middle and late pregnancy, if abdominal discomfort occurs, and the symptoms are relatively 2, hormonal changes: during pregnancy, if abdominal discomfort occurs and the symptoms are mild and there is no vaginal bleeding, it may be due to the gradual enlargement of the uterus, which compresses the pelvic bones, squeezes the abdominal organs, pulls the ligaments on both sides of the uterus and stimulates the abdominal wall nerves, resulting in abdominal discomfort in pregnant women; 3, hormonal changes: during pregnancy, due to the increased secretion of estrogen and progesterone in the body, which causes relaxation of the abdominal ligaments and inhibits the smooth muscle peristalsis of the stomach and intestines, resulting in indigestion, which can cause significant abdominal discomfort. Second, pathological factors: 1, digestive tract diseases: during pregnancy due to unclean and improper diet can cause digestive tract diseases, discomfort may appear around the navel, usually accompanied by diarrhea, nausea, vomiting and other symptoms; 2, urinary system diseases: if the lower abdomen appears sore and swollen discomfort, accompanied by symptoms of frequent urination, urinary urgency, painful urination, may be acute cystitis; 3, gynecological diseases: pregnant women suffering from adnexitis, pelvic inflammatory disease, etc. If there is abdominal pain or vaginal bleeding and other symptoms, it may be pre-miscarriage, and pregnant women need to seek medical treatment immediately.