Nausea and vomiting after eating may be related to dietary stimulation, gastroesophageal reflux, liver and gallbladder diseases, early pregnancy reaction, etc. 1. Dietary stimuli: Nausea and vomiting can occur when eating cold, spicy, stimulating, moldy, poisonous and contaminated food. 2. Gastroesophageal reflux (GERD): caused by reflux of gastric contents, patients will experience nausea, vomiting, acid reflux, belching (hiccups). Severe cases can lead to esophagitis and narrowing of the esophagus. 3. Hepatobiliary diseases: Hepatitis, cholecystitis, gallstones, liver and gallbladder tumors will affect the digestive system, and the patients may suffer from fatigue, anorexia, liver discomfort, nausea, vomiting, anorexia of oil, yellowing of the skin and sclera. 4. Early pregnancy reaction: nausea and vomiting may also occur in early pregnancy reaction after sex. Early pregnancy reaction is due to increased levels of estrogen after pregnancy, some regurgitation serious will have frequent vomiting, and even affect the normal diet. Eating nausea and want to vomit, need to go to the hospital in a timely manner, clear cause of the basis, under the guidance of the doctor for symptomatic treatment.