Nausea when eating can be caused by pregnancy, digestive system diseases, renal insufficiency or cardiovascular diseases. Patients need to pay attention to it and go to the hospital in time for corresponding examination and treatment under the guidance of professional doctors. Common causes and treatment 1. Pregnancy reaction: In early pregnancy, women may experience increased secretion of human chorionic gonadotropin, causing nausea, vomiting, loss of appetite and other symptoms. For the milder pregnancy reactions, no special treatment is usually needed, and most of them can be relieved on their own after the third month of pregnancy. For women with more severe symptoms, they need to be treated with drugs under the guidance of professional doctors as appropriate. 2. Digestive system diseases: including gastritis, peptic ulcer, acute pancreatitis, cholecystitis and other diseases, mainly with nausea, vomiting and upper gastrointestinal bleeding as clinical manifestations. Patients can choose appropriate treatment through esophageal ultrasound, gastroscopy, routine stool examination and other items, combined with the specific diagnosis of the doctor and the patient’s condition after identifying the cause; 3, cardiovascular diseases: such as hypertension, coronary heart disease, etc., can appear epigastric distention and pain, nausea, with dizziness, chest pain and other symptoms. They should improve their lifestyle, maintain a calm state of mind, and avoid smoking, excessive alcohol consumption, and excessive exertion. If it is caused by hypertension, take antihypertensive drugs as prescribed by the doctor. In case of coronary artery disease, oral antiplatelet and anti-myocardial ischemic drugs can be taken under doctor’s guidance, and coronary artery blood flow can also be reconstructed through bypass surgery, etc. 4. Note that there are more diseases that cause nausea when eating, so it is necessary to strictly distinguish the diseases according to the accompanying symptoms to avoid delaying the disease.