A pain in the lower left corner of the stomach may be caused by malignant tumors of the intestinal tract, urinary stones, ulcerative colitis and other diseases, according to the cause of the surgical treatment, extracorporeal shock wave lithotripsy and oral medication. 1. Surgery: a burst in the lower left corner of the stomach is commonly seen in malignant tumors of the intestinal tract, patients can see abdominal pain, anemia, nausea and other related symptoms, according to the situation of radical resection surgery or radiotherapy and other means. 2. Extracorporeal shock wave lithotripsy: a burst of pain in the lower left corner of the stomach can also be seen in the left side of the ureteral stone, patients can see the naked eye hematuria, abdominal pain radiating to the perineum, you can choose to extracorporeal shock wave lithotripsy or surgical incision to remove the stone to treat. 3. Oral medication: a burst of pain in the lower left corner of the stomach can also be seen in the intestinal tract of chronic inflammatory diseases such as ulcerative colitis, the patient should avoid spicy and stimulating food, according to the situation of oral immunosuppressants, commonly used mesalazine and dexamethasone, and so on. It is recommended that patients go to the hospital as soon as possible, by the doctor according to the specific conditions, to develop individualized diagnosis and treatment plan, so as not to delay the condition.