Lying down with a full stomach may lead to gastroesophageal reflux, indigestion, increase the chances of developing gastric ulcers and other hazards. 1. Gastroesophageal reflux: lying down after eating will cause a large amount of food to accumulate in the stomach, resulting in increased pressure on the stomach, leading to the upwelling of stomach acid along the esophagus after the upwelling of food, which is prone to the condition of gastroesophageal reflux. 2. Indigestion: lying down after eating will slow down the peristalsis of the gastrointestinal tract, which will easily affect the absorption of food, and indigestion will occur. 3. Increase the chances of stomach ulcers: If you lie down after eating for a long time, the stomach contents can not be digested in a timely manner, which may stimulate the secretion of gastric acid and increase the chances of stomach ulcers. After eating, it is recommended to stand for about half an hour or light activity, more conducive to the digestion and absorption of food.