More than 3 months after lumbar disc herniation fusion surgery, radiographs show that there is still no bone scab growth is not normal, generally three months after surgery is the time to judge the healing, at this time there is no bone scab growth is not normal. Lumbar disc herniation fusion surgery is to remove the herniated disc, implant the fusion device, and then use the nail rod to fix the adjacent vertebrae, so that the vertebrae are fused together. The postoperative healing process is generally divided into three periods: hematoma, inflammation, mechanization period, primitive bone scab formation period and bone plate formation and shaping period. 1. Hematoma, inflammation, mechanization period: This period usually lasts for about 4 weeks, and the patient needs to rest in bed and wear a waist cuff. 2. Primary bone scab formation period: this period is generally 4 to 8 weeks after surgery, at this time the patient can gradually sit up. 3. Bone plate formation and shaping period: this period is generally 8 to 12 weeks after the operation, you can carry out appropriate activities and rehabilitation training under the guidance of the doctor. Three months after the lumbar disc fusion surgery, you can go to the hospital to take a lumbar spine CT to determine the healing, if the bone scabs have not grown at this time, you should check and diagnose the cause of the problem and treat it in a timely manner.