Nausea and stomach pain are caused by indigestion, improper diet, stomach diseases, gallbladder and pancreatic diseases. Indigestion has a wide range of people. During the attack of the disease, because the food is not able to be expelled, the pressure in the stomach increases due to bad fermentation in the stomach, so there is not only a feeling of nausea and vomiting, but also a feeling of stomach distension. Many people experience nausea and stomach pain due to stomach diseases. Common stomach diseases that can cause nausea and stomach pain include esophagitis, gastritis, gastric ulcer, gastric prolapse, pyloric obstruction, and stomach cancer. Since the gallbladder and pancreas are adjacent to the stomach, they can also be involved in the stomach and induce stomach pain during disease attacks, while gallbladder and pancreas diseases can affect food digestion and cause nausea, such as cholecystitis, gallstones, pancreatitis and pancreatic cysts.