With lumbar spine fusion and internal fixation surgery, it is common to have sex around 3 to 6 months. Due to the individual variability, the time for sexual intercourse is only an approximate range. Generally after lumbar spine fusion and internal fixation surgery, the first half month can cause pain if the back is exerted, and may also cause non-fusion or broken fixation. The time it takes for a patient to have their spine fused and immobilized after lumbar internal fixation surgery ranges from 3 to 6 months and varies from person to person. Some patients fuse more quickly, which may take about 3 months; some patients fuse more slowly, which may take about 6 months. Usually for lumbar spine fusion and internal fixation surgery, after three months, it is recommended to go to the hospital for a follow-up to check the recovery after the surgery. If the recovery is good, you can have sex appropriately, but be careful not to take special and intense methods or too frequent, otherwise it will easily cause lumbar injuries and even affect your health.