Pain in the lower left side of the abdomen in women is only a clinical symptom and not a separate disease. The causes of pain symptoms in the lower left abdomen are different and are treated differently. First, if this pain symptom is related to menstrual cycle, most of them are due to pain caused by gynecological diseases, such as inflammation of the left fallopian tube and left fallopian tube cyst, patients can have ultrasound examination to further clarify the diagnosis. For simple inflammatory reaction, anti-inflammatory treatment can be given, and surgery can be considered when there are tubal ovarian cysts. Second, if it is a symptom of pain in the left lower abdomen related to urination, it is usually related to urinary stones or inflammatory reaction, and routine urinalysis and urinary ultrasound examination can be performed to clarify the diagnosis. If the pain is caused by inflammation, anti-inflammatory treatment can be given. If the pain is caused by stones, conservative treatment or surgical treatment should be taken according to the size and location of the stones, drink more water and eat less spicy food.