Pain in the lower left corner of the stomach may be ureteral stones or gastroenteritis, and the specific location and nature of the pain in the two are slightly different. 1. Ureteral stones: these patients usually drink less water, and long-term sitting position, causing the formation of ureteral stones, when the stones cut through the left side of the ureter, resulting in pain in the lower left corner of the stomach. The pain is usually unbearable and persistent, and drinking more water can promote the discharge of stones. 2. Gastroenteritis: For patients with gastroenteritis, mainly due to improper diet, resulting in pain in the lower left corner of the stomach, accompanied by nausea, vomiting, diarrhea, dizziness, headache and other discomforts, generally drink more water, abdominal massage, appropriate antibiotics, the pain will be slightly improved, but to follow the doctor’s instructions for the use of medication. In addition, gynecological diseases, long-term constipation, etc., will also have pain in the lower left corner of the stomach, so when this situation occurs, you need to improve the examination as soon as possible to clarify the cause.