Gastric sinusitis usually presents as pain in the upper middle abdomen. Gastric sinusitis is an inflammation of the mucous membrane in the sinus section of the stomach. The stomach is divided into three parts: the fundus, the body and the sinus, and the sinus is the part of the stomach that connects to the duodenum. Gastric sinusitis is often manifested as pain, fullness and discomfort in the middle and upper abdomen, which may be accompanied by belching, loss of appetite, diarrhea and constipation. In normal times, we should develop the habit of regular meals, do small meals, do not overeat, eat more light, warm and soft food, eat less greasy, spicy and other stimulating foods, avoid drinking coffee, strong tea, alcohol and so on. If abdominal pain, belching, indigestion and other symptoms occur, seek medical attention in a timely manner, and actively carry out regular treatment.