There are many diseases that cause pain in the left middle abdomen, such as chronic gastritis, ulcer, enteritis, pancreatitis, urinary tract stones, intestinal tumors, abdominal wall lymphadenitis and so on. 1. Chronic gastritis: this cause of chronic gastritis may cause symptoms of pain in the left middle abdomen. 2. Ulcer: gastric ulcer, duodenal ulcer and other diseases may also lead to left mid-abdominal pain. 3. Enteritis: Infection of the intestines by pathogenic bacteria, causing intestinal spasms, can also lead to pain in the left side of the abdomen. 4. Pancreatitis: Most of the cases are caused by overeating, alcoholism and other factors, which can also cause symptoms of pain in the upper left abdomen. 5. Urinary stones: left kidney stones and left ureteral stones may also cause left mid-abdominal pain. 6. Intestinal tumors: benign tumors malignant tumors and other diseases in the intestinal tract can also lead to left mid-abdominal pain. 7. Abdominal wall lymphadenitis: inflammatory stimulation of abdominal lymph nodes can cause lymph node enlargement and pain can also cause symptoms of left mid-abdominal pain. There may be other causes of left mid-abdominal pain, you need to go to the hospital in time to check, follow the doctor’s instructions for treatment.