Hidden pain in the upper left abdomen may be the result of stomach disorders, colon lesions, pancreatic lesions, and other conditions. 1. Stomach diseases: If you suffer from gastric ulcer, gastritis, gastric polyp, gastric cancer and other diseases, it may lead to hidden pain in the left upper abdomen. 2. Colon lesions: when patients have Crohn’s disease, ulcerative colitis, colon cancer, colon polyps and other lesions, it may lead to different degrees of abdominal pain, and if the lesion is located in the left upper abdomen, hidden pain in the left upper abdomen will occur. 3. Pancreatic lesions: when the patient has pancreatic cysts, pancreatitis, pancreatic cancer and other lesions, it may lead to the symptoms of hidden pain in the left upper abdomen. The pain in the upper left abdomen may also be due to other reasons, the patient should go to the regular hospital in time, in order to clarify the cause of the disease, and follow the doctor’s instructions for standardized treatment.