Gastric sinusitis can cause indigestion and loss of appetite, which can lead to weight loss due to insufficient nutritional intake by the organism. Gastric sinusitis is an inflammation of the mucous membrane in the sinuses of the stomach caused by a variety of factors, and the older you are, the more likely you are to develop this disease. It is usually caused by factors such as Helicobacter pylori infection or duodenal gastric reflux. The main clinical manifestations are symptoms such as epigastric fullness and discomfort, epigastric pain, belching and loss of appetite. As gastro-sinusitis may lead to indigestion, it is difficult for the food consumed by the human body to be fully digested and absorbed, and the loss of appetite caused by gastro-sinusitis will make the patient reduce the intake of food, which further reduces the energy gained by the body, thus causing the body to experience the symptoms of emaciation and weight loss. If you find this disease, you must actively cooperate with the doctor for treatment in time, to avoid further development of the disease, which will bring more harm to the body.