When Does Sciatica Need Surgery?

Sciatica is caused by a herniated disc pressing on the sciatic nerve. Most herniated discs resolve without surgery, with around 85-90% improving within 6 to 12 weeks.^[1] For those whose sciatica has progressed from acute to persistent, the question of surgical intervention becomes critical to return to an active, pain-free life.

The typical timeframe is 3 to 6 months of conservative treatment before considering surgical intervention. This reflects the natural healing window for most herniated discs, during which inflammation subsides and the spine naturally compensates for mild disc herniation.

Conservative treatment generally includes pain medication, physical therapy, and staying as active as symptoms allow.

After 6 months, patients with chronic sciatica are less likely to improve without further intervention. At this point, a specialist opinion from SpinePro is appropriate.

If your symptoms are severe enough that surgery is the best option, earlier intervention may be better. A 2022 guideline from the North American Spine Society suggests that surgery within 6 months to a year of symptom onset is associated with faster recovery and improved long-term outcomes.^[2]

If you’ve been treated regularly by a chiropractor or physiotherapist, taking medication, and staying as active as you can manage for up to six months, and your sciatica is getting worse, conservative treatment probably isn’t going to work for you. The same applies if you keep improving and then relapsing.

In these scenarios, it is apparent the root cause of your sciatica is unlikely to resolve by itself as your disc has become increasingly herniated, and surgical intervention is likely to be required.

If numbness in your leg or foot is spreading rather than improving, or you’re noticing new weakness (difficulty lifting your toes when you walk, or pushing up onto tiptoes), the sciatic nerve is under sustained pressure.

To help you assess where you are, ask yourself:

• Is my pain the same or worse despite weeks of treatment?
• Do I keep getting better then relapsing?
• Is numbness or weakness in my leg getting worse, not better?
• Am I having to avoid activities or social engagements to manage the pain?
• Is my sleep regularly disrupted?
• Am I unable to work or carry out daily life?

If you’re answering yes to several of these, a specialist opinion from SpinePro is appropriate.

If your doctor believes surgery may be appropriate, you’ll be referred to a spinal specialist such as SpinePro. Public health service waiting times for specialist appointments can be lengthy, and many patients elect to seek a private consultation.

You’ll need a recent MRI scan (within the past six months). MRI is the standard imaging for confirming a herniated disc and showing whether it’s compressing the sciatic nerve. If your symptoms match what the scan shows, you’re likely to be a suitable candidate for surgery.

Surgical options include discectomy, spinal fusion, and Prodisc® L total lumbar disc replacement, each with different implications for recovery and long-term mobility. However, surgical options offered by public health services such as the NHS are limited, and lumbar disc replacement is not routinely offered.

1. Lumbar Disc Herniation – StatPearls
2. Diagnosis And Treatment Of Lumbar Disc Herniation With Radiculopathy Clinical Guideline – North American Spine Society, 2022