Left lower abdominal pain is a common symptom. There are many reasons, mainly considered gastroenteritis, gynecological diseases, urinary system diseases, or kidney-related diseases. Poor dietary habits or an environment that is too cold or too hot stimulates the gastric mucosa, resulting in gastroenteritis, and damage to the gastric mucosa can cause abdominal pain, diarrhea, and other manifestations. If you are a woman, you may also need to consider gynecological diseases, such as adnexitis or pelvic inflammatory disease, ovarian cysts and other diseases, can cause pain in the left lower abdomen. If you are pregnant, you also need to consider that the pain is caused by ectopic pregnancy, and you need to go to the hospital in time for treatment. Cystitis or urinary tract diseases can also cause pain in the lower left abdomen; it may also be caused by nephritis or kidney stones, or even kidney tumors. Because there are many organs in the lower left side of the human abdomen, the pain must go to the hospital in time to clarify the cause of the disease, follow the doctor’s instructions for treatment, to avoid delaying the condition.