Left lower abdominal pain after hysteroscopic surgery may be related to pelvic fluid and pelvic infection. 1. Pelvic fluid accumulation: saline will be used during hysteroscopic surgery, under the influence of pressure, a small amount of saline will pass through the uterine horn and enter into the fallopian tube, flowing to the pelvis, causing a small amount of fluid accumulation in the pelvis, and some sensitive patients feel pain in the left lower abdomen. 2. Pelvic infection: if in addition to the pain in the left lower abdomen, accompanied by abnormal vaginal discharge bleeding, then consider whether the pelvic infection, but if you want to know the specific cause of the disease, you need to go to the hospital to do ultrasound of the uterus and its attachments, and take vaginal secretions for examination. There are other causes of lower left abdominal pain after hysteroscopic surgery, it is recommended to go to the hospital for a detailed examination to determine the specific cause of the disease and symptomatic treatment.