Nausea and vomiting after eating lard may be caused by personal constitution, or it may be caused by gastritis, gastric ulcer and other lesions. 1. personal preference: everyone has a different appetite, some people may have nausea and vomiting after eating lard, some people will feel lard is very fragrant, very tasty, this is due to personal preference and decision. 2. Gastritis: this group of people have indigestion, gastric mucous membrane damage, gastric acid secretion increase phenomenon, and lard will aggravate the digestive burden of patients with gastritis, thus nausea and vomiting and other phenomena. 3. Gastric ulcer: these people themselves can appear nausea and vomiting phenomenon, and have indigestion, gastrointestinal power insufficiency and other symptoms, lard belongs to the food is not easy to digest, after eating will aggravate gastric dyspepsia, leading to nausea and vomiting further aggravation of the symptoms. Gastritis, gastric ulcer people can be treated by taking drugs such as omeprazole, and if there is Helicobacter pylori infection should be eradicated using the four-pronged method, i.e., a proton pump inhibitor such as omeprazole + a bismuth such as bismuth pectin + two antibiotics such as amoxicillin and clarithromycin. In addition, liver, gallbladder and pancreatic diseases such as cholecystitis, hepatitis and pancreatitis can also present with nausea and vomiting after consuming a high-fat diet. You should go to the hospital in time to see a doctor to clarify the cause of the disease and then treat it.