Heartburn in women in early pregnancy is a normal physiological phenomenon. Because of the large change of hormone level in the body in early pregnancy, it will affect the secretion of gastric acid and make it decrease. Moreover, the gastric emptying time is prolonged, so human chorionic gonadotropin will cause irritation to the gastrointestinal tract, resulting in heartburn, vomiting, bloating, nausea and other gastrointestinal discomfort symptoms. In addition, the endocrine changes in women after pregnancy, the pressure in the stomach increases with the increase of pregnancy months, and reflux occurs in the esophagus, so that stomach acid can cause stimulation of the sensory organs and heartburn. When women reach the middle of pregnancy, the increase of the uterus will compress other organs, and the pressure on the stomach will slow down the peristalsis of the gastrointestinal tract, and if the gastric juice stays in the stomach for a long time, it will also easily cause heartburn, but heartburn symptoms are also related to women’s constitution and living and eating habits.