Nausea after eating may be caused by improper diet, gastrointestinal diseases, pregnancy, abnormal liver function and other conditions. 1. Improper diet: If you eat spicy food or cold food, it is very likely to stimulate the gastrointestinal tract and cause nausea after meals. 2. Gastrointestinal diseases: Some gastrointestinal diseases may cause nausea after meals. Common chronic or acute gastritis, gastroenteritis and so on. 3. Pregnancy: If a woman is in her childbearing years, has had sexual intercourse without contraception in recent times, and has delayed menstruation, she needs to consider that she is pregnant. After pregnancy, due to estrogen and progesterone stimulation, it will lead to pregnancy reaction, such as nausea, vomiting and so on. 4. Abnormal liver function: If the patient’s liver function is damaged, it will affect the loss of appetite and cause nausea after meals. It is recommended that the patient should consult the doctor in time for systematic examination to clarify the cause of the disease.