When lower back surgery is considered
The lower back is where most spine surgery happens, and also where most spine problems resolve without it. The great majority of episodes of back pain and even of sciatica settle over weeks with the right non-surgical care, so the first job is to find out what is actually driving your symptoms and give that a fair chance to improve.
Surgery becomes reasonable when a specific structural problem is compressing a nerve, when it explains what you are feeling, and when time and non-surgical treatment have not been enough. Persistent leg pain from a trapped nerve is the clearest case. Back pain on its own is a weaker indication, and deserves more caution.
CAUTION
Seek urgent assessment - the same day - if you develop numbness around the groin, inner thighs or buttocks, difficulty starting or controlling urination, loss of bowel control, or weakness in both legs. These can indicate cauda equina syndrome, which is treated as an emergency.
What makes the lower back different
The spinal cord ends at around the first lumbar vertebra. Below that the canal carries a bundle of individual nerve roots, which is why lower back surgery is usually working around named nerves rather than the cord itself, and why a well-localised problem can often be treated through a very small opening.
The lumbar spine also carries the body’s load and does most of its bending. That is why it wears first, why instability is a live question here in a way it is not higher up, and why the decision between simply taking pressure off a nerve and stabilizing the segment is the central one in this region.
Decompression, or decompression and fusion
Nearly every lumbar operation is a version of one of two things.
- Decompression removes what is pressing on the nerve and leaves the joint alone. A discectomy takes the herniated fragment; a laminotomy or laminectomy takes bone to widen a narrowed canal. Movement at the level is preserved, and recovery is usually the quicker of the two.
- Fusion joins two vertebrae so the segment no longer moves. It is added when the level is unstable, when a vertebra has slipped, or when the decompression required would itself leave things loose. Fusion has a longer recovery and permanently changes how that part of the spine works, so it is a decision worth understanding properly.
There are several routes to a fusion - from the front, the side, or the back - and they exist because each avoids a different problem. Which is appropriate is a matter of your anatomy, previous surgery and what needs correcting.
What to expect
Endoscopic and minimally invasive procedures are frequently day cases or a single overnight stay, with most people walking the same day. Open decompression usually means one to three days. Fusion is longer again, and the recovery runs for months rather than weeks while the bone knits.
Some endoscopic work can be done under local anesthetic with sedation. Most lumbar surgery uses a general anesthetic. You will leave with a plan for pain relief, a clear list of what to avoid and for how long, and a rehabilitation program - which does much of the real work of the recovery.
If surgery is not the right answer
For most people with lower back pain it is not, and saying so is part of the job. Where the imaging does not match your symptoms, where the problem is likely to settle, or where the odds do not favor an operation, we treat you without one - through non-surgical care, targeted injections, or rehabilitation.
If you have been told you need a fusion and want that tested before committing, a second opinion is a reasonable step. Fusion is not easily undone, and it is worth being sure.
Conditions in the lower back
These are the problems that bring people to us for lower back surgery. Each one explains what it is and how it is treated, surgery included or not.
Procedures used in the lower back
Ordered from least to most invasive. Which one fits is decided from your imaging and examination, not chosen from a list.
Common questions
What is the difference between a decompression and a fusion?
A decompression takes pressure off a nerve - removing the fragment of disc or the bone that is crowding it - and leaves the joint moving. A fusion joins two vertebrae into one segment so that level stops moving. Decompression alone suits most trapped-nerve problems. Fusion is added when the segment is unstable or slipping, because taking more bone away from an already loose level can make it looser. The distinction matters: they have different recoveries and different long-term consequences.
Will surgery fix my back pain, or only my leg pain?
Be cautious of anyone who promises either. Surgery is generally more reliable for leg pain caused by a compressed nerve than for back pain alone, because the target is identifiable and the mechanism is clear. Back pain has more possible sources and responds less predictably. If your main complaint is back pain rather than leg pain, that is a reason for a careful assessment rather than a quick operation.
Do I need a fusion if I have a disc problem?
Usually not. Most disc herniations that need surgery are treated with a discectomy that removes the offending fragment and leaves everything else alone. Fusion enters the picture for instability, for a slipped vertebra, for repeated recurrence at the same level, or where decompression would leave the segment unstable. If fusion is being recommended for a straightforward disc herniation, it is fair to ask why and reasonable to seek another opinion.
How long until I can sit, drive and return to work?
After an endoscopic or microdiscectomy procedure many people are up the same day, driving within one to two weeks, and back to desk work inside two to four. Fusion is longer: driving usually at four to six weeks and a graded return over two to three months. Physical or heavy work adds time in both cases. These are the usual ranges, not commitments - your own plan is set at follow-up.
Is endoscopic surgery as effective as open surgery for the lower back?
For the problems it suits, current evidence puts outcomes broadly comparable, with less muscle disruption, less blood loss and a faster early recovery. What it is not is universal. A well-localised disc herniation or a focal stenosis is good ground for it; multi-level disease, significant instability or distorted anatomy from previous surgery may be better served by a wider exposure. The right question is not which technique is better in general but which is right for your anatomy.
Can lower back surgery be done without general anesthetic?
Some endoscopic procedures can be performed under local anesthetic with sedation, which suits patients for whom a general anesthetic carries added risk and allows a very quick discharge. It depends on the procedure, the level and on you being comfortable staying still. Most lumbar surgery is still done under general anesthesia, and the choice is made with the anesthetist rather than in advance.