The feeling of wanting to vomit when eating may be caused by factors such as insufficient gastric power. The feeling of wanting to vomit for a short period of time may be caused by acute gastritis, cold or improper diet, drugs, etc. It will improve after removing the cause and treating the symptoms. The feeling of nausea when eating for a long time requires gastroscopy for clear diagnosis, mostly seen in acute and chronic gastritis, peptic ulcer, peptic polyp with erosion, peptic tract tumor, etc. Hepatobiliary problems such as acute and chronic hepatitis, intrahepatic bile duct stones and common bile duct stones can also occur. Pancreatic problems such as chronic pancreatitis and pancreatic tumors also need to be ruled out, all of which can be diagnosed through relevant examinations, such as blood biochemistry, blood and urine amylase, lipase, abdominal ultrasound, CT, etc. Functional diseases such as gastrointestinal dysfunction, gallbladder, and post-operative abdominal surgery can also occur, as can chronic pharyngitis, cervical spine problems, and brain problems, all of which can be clarified by relevant examinations.