Months after lumbar spine surgery has been difficult to defecate, the possible causes are nerve function paralysis, intestinal obstruction, etc. Its treatment includes general treatment, medication, physical therapy and so on. 1. Paralysis of vegetative nerve function: Nutritional nerve drugs, such as methylcobalamin and vitamin B1, can be used to help the repair of nerves and promote the recovery of nerve function, so that the symptoms can be improved. It can also be combined with formal physical therapy and acupuncture. 2. Intestinal obstruction: It is recommended to drink more water, eat more vitamin-rich vegetables and fruits, eat more food containing crude fiber, and at the same time with abdominal massage, that is, from the right side to the left side of the massage, which can promote intestinal peristalsis, thus promoting defecation. The above medications should be used under the guidance of a doctor. If the above symptoms occur for a long time, it is recommended to consult a doctor in time to clarify the cause of the disease and receive appropriate treatment.