The vague pain under the left rib cage of the stomach may be due to pancreatitis, gastric ulcer, acute gastroenteritis, muscle spasm, old injury, intercostal neuralgia or inflammation of the rib cartilage, common causes and related treatment are as follows: 1. Local tissue injury: such as prolonged poor posture, resulting in muscle strain, playing basketball, netball, tennis caused by local muscle strain, history of trauma at the rib cage and other local tissue injury It is recommended to go to the hospital in time, which can be treated by means of external plasters, acupuncture, massage and physiotherapy. If the examination reveals a fracture at the ribs, you need to rely on surgical treatment to fix the ribs; 2. Pancreatitis: an attack of pancreatitis is seen as severe pain in the left upper abdomen, radiating to the back. Urgent examination of blood and urine amylase or lipase, as well as routine blood tests to do pancreatic ultrasound, after the diagnosis of pancreatitis can use acid suppressants, growth inhibitors, etc. to relieve symptoms; 3, gastric ulcer: patients may have vague pain or colic at the lower edge of the left rib cage, and the pain increases after eating. It is recommended to go to the hospital for gastroscopy or barium meal examination in time, after diagnosis, you can take drugs, such as acid suppressants and mucosal protectors to relieve symptoms; 4, acute gastroenteritis: patients with increased intestinal peristalsis, resulting in hidden pain in the stomach, acid suppressants and antibiotics can be used for treatment; 5, intercostal neuralgia or inflammation of the rib cartilage: can also lead to hidden pain in the left side of the stomach under the ribs, you can use anti-inflammatory and analgesic drugs such as ibuprofen, acetaminophen 6, other: numerous cardiopulmonary disorders can also cause hidden pain under the ribs, patients should go to the hospital in a timely manner to clarify the cause and actively treat it to avoid delaying the treatment.