The common clinical cause of abdominal soreness in pregnant women is the soreness of the stomach caused by the stretching of the uterine ligaments or compression of the gastrointestinal tract due to the enlargement of the uterus. In addition, overexertion during pregnancy, pseudo contractions, miscarriage and other conditions may also cause stomach soreness during pregnancy, which should be combined with the clinical manifestations of pregnant women and other accompanying symptoms to make a comprehensive judgment and timely consultation for discomfort. 1, uterine ligament stretching: with the growth and development of the fetus, the uterus gradually increases, the pelvic cavity is filled with blood, ligament stretching may lead to abdominal soreness and swelling, as well as vague pain at the root of the thigh in the lower abdomen, which can usually be gradually relieved after rest and is 2, gastrointestinal tract problems: due to the increase of the uterus may press the stomach upward, which in turn may cause a decrease in gastric tone, peristalsis, delayed emptying, reduced secretion of gastric acid, gastric sphincter relaxation, etc., so that pregnant women feel abdominal acidity, heartburn, regurgitation; 3, overwork: during pregnancy engaged in heavy physical labor, strenuous activities, may cause excessive contraction of abdominal muscles, abdominal acidity and swelling 4, pseudo contractions: along with the increase in the week of pregnancy, the uterus gradually increased, there may be irregular abdominal tightness, but the intensity is weak, the interval is long, the duration is short, not accompanied by other uncomfortable symptoms may be pseudo contractions; 5, preterm abortion or preterm labor: if the pregnant woman abdominal acidity and swelling accompanied by irregular abdominal pain, not relieved after rest, the duration is long, the interval is short, the intensity increases and decreases need to consider the possibility of preterm abortion Or the possibility of preterm labor, to go to the hospital for examination as soon as possible, and follow the medical advice for fetal preservation treatment after diagnosis.