The pain and nausea are usually caused by chronic gastritis, gastric ulcer, cholecystitis, pancreatitis and other diseases. Chronic gastritis patients have chronic inflammation of the gastric mucosa, patients often have stomach pain, and the pain is not regular, part of the chronic gastritis patients in the stomach pain at the same time, but also because of the gastric wall spasm contraction and nausea caused by the symptoms. Gastric ulcer patients have ulcerated surface of the gastric mucosa, especially when the gastric acid comes into contact with the ulcer surface, it will cause irritation to the ulcer surface, which will not only cause pain in the stomach, but also accompanied by nausea, vomiting and other symptoms in some people. Since the gallbladder and the stomach are relatively close to each other, inflammation of the gallbladder can also involve the stomach, causing stomach pain. During an attack of cholecystitis, bile excretion is impaired, which affects the digestion of food, and many patients with cholecystitis experience nausea and vomiting at the same time. The pancreas secretes pancreatic fluid, which mainly helps in the digestion of fatty foods. When too much pancreatic fluid is secreted and not excreted properly, it can lead to an attack of pancreatitis. During an attack of pancreatitis, the patient will not only have symptoms such as severe upper abdominal pain, but also nausea, vomiting and steatorrhea.