Abdominal pain on the left side of eating is generally associated with indigestion, gastric ulcer, chronic hepatitis, pancreatitis and gastric cancer, and is often treated with medication, surgery and other means to promote recovery. Common causes and treatment methods are as follows: 1, indigestion: cold, spleen and stomach cold and other factors can trigger indigestion. At this time, due to the lack of gastric power, the digestion and emptying time of food after eating is prolonged, which causes irritation to the stomach wall, and some patients may have left abdominal pain. Daily diet can eat some light, well-digested food, such as thin rice, noodles, etc.; 2, gastric ulcer: this is due to eating to stimulate the secretion of gastric acid, too much gastric acid damage to the gastric mucosa, and then spasm, pain and other symptoms, if the ulcer is located in the left side of the stomach, the patient can report left abdominal pain. Drugs that inhibit gastric acid secretion are commonly used for treatment, such as pantoprazole, omeprazole, etc.; 3. Chronic hepatitis: Patients with hepatitis have impaired liver function and impaired gallbladder function. After eating greasy food, due to the need for bile secretion, stimulating the hepatobiliary lesions, which in turn can lead to symptoms such as pain in the left abdomen. Often use liver-protective drugs for treatment, such as glycopyrrolate preparations, gardenia jasminoides, etc.; 4, pancreatitis: after eating, the digestive system begins to work, stimulating the pancreas to secrete digestive enzymes, at this time, patients with pancreatitis may have left abdominal pain, accompanied by nausea, vomiting and other symptoms. Patients with pancreatitis need to be hospitalized; 5. Stomach cancer: due to the invasion of surrounding tissues by cancer cells, which causes symptoms such as stomach pain. Some patients have more obvious symptoms when they eat and report pain in the left side of the stomach and epigastric region, often accompanied by vomiting blood and black stool. Treatment is mainly surgery, and combined with perioperative radiotherapy and chemotherapy for comprehensive treatment. Precautions for stomach discomfort require good dietary regimen, avoid eating greasy, spicy, cold and irritating foods, such as chili peppers. In addition, you can do some exercises in your daily life, combining work and rest to enhance your physical fitness.