Clinical symptoms during pregnancy vary widely from one pregnant woman to another. Pregnant women may experience various physical symptoms, and some women may experience increased salivation during pregnancy. There are the following reasons for the increased salivation of pregnant women: 1. Dietary factors, if pregnant women eat sour food during pregnancy, such as hawthorn, apricot, plum, strawberry, etc., it will cause the secretion of salivary glands to flourish and the symptoms of increased salivation will appear. 2. Early pregnancy reaction, due to changes in the level of sex hormones in the body during pregnancy, causing increased secretion of gastric acid and delayed gastric emptying, thus causing increased salivation. 3. Gastroesophageal Reflux, in the middle and late pregnancy, due to the development of the fetus and the increase of amniotic fluid, resulting in a significant increase in the uterus, the bottom of the uterus rises and presses the stomach, so that the anatomical position of the stomach is changed, the emptying of gastric contents is obstructed, and gastroesophageal reflux causes increased salivation.