Having lost 9 pounds in two months with stomach disease should be treated according to the type of stomach disease. The common gastric diseases are chronic gastritis, gastric ulcer and gastric cancer, etc. The commonly used treatments are anti-infection treatment, anti-gastric acid treatment and surgical treatment, etc. The most common treatments are anti-infection treatment, anti-gastric acid treatment and surgical treatment. 1. Chronic gastritis: chronic gastritis will lead to indigestion, or chronic gastritis caused by eating less, which caused two months lost 9 pounds, need to standardize the treatment of gastritis, gastritis disease after the improvement of food intake back to normal, weight can be restored. 2. Gastric ulcer: patients with gastric ulcer can lose 9 pounds in two months due to decreased appetite, they can be treated with anti-gastric acid, such as Esomeprazole magnesium enteric-coated tablets, Benactyzine hydrochloride tablets, Omeprazole magnesium enteric-coated tablets and so on, as well as gastric mucous membrane protection treatment such as Fructus Bismuth. 3. Gastric cancer: patients with gastric cancer often lose 9 pounds in two months due to multiple factors such as consumption of tumor and abnormal digestive function. Surgical resection of tumor can effectively treat gastric cancer, thus relieving clinical manifestations such as loss of appetite and wasting. Patients who have lost 9 pounds in two months due to gastric disease should go to the hospital in time to clarify the cause of the disease and standardize the treatment. Drugs need to be used under the guidance of a professional physician, and should not be used arbitrarily on their own.