Lumbar spine fusion surgery is a kind of ablation surgery for lumbar disc herniation, two months after the surgery, the recent increase in the number of bowel movements is usually not related to the surgery, usually related to physiological factors, intestinal flora disorders, irritable bowel syndrome and other factors. 1. Physiological factors: related to poor dietary habits, lifestyle habits, such as often eating spicy, stimulating food, or often do strenuous exercise, resulting in increased intestinal peristalsis, which may cause increased bowel movements. 2. Intestinal flora disorders: when the intestinal flora disorders, easy to cause intestinal peristalsis too fast, thus causing an increase in the number of bowel movements, some patients will find that the stool is mucus-like. 3. Irritable bowel syndrome: mainly a dysfunctional syndrome, if not dealt with in a timely manner, may lead to changes in gastrointestinal function and peristalsis, defecation habits as well as the nature of defecation will change, resulting in intestinal hyperperistalsis will increase the number of bowel movements. It is recommended to observe for a period of time, and if no relief is achieved for more than a week, it is necessary to consult a doctor and analyze the cause of the disease with the help of a professional physician before proceeding with the treatment.