Sciatica and spinal surgery

Spinal surgery for sciatica is considered when conservative treatments fail to relieve pain or neurological symptoms. Sciatica is caused by irritation or compression of a lumbosacral nerve, often due to a herniated disc, spinal stenosis, or degenerative changes in the spine. Most cases improve with non-surgical measures, but surgery may be recommended for persistent pain, weakness, or numbness that affects daily life.

What is sciatica and what causes it?

Sciatica refers to pain that radiates along the path of a lumbrosacral nerve, which runs from the lower back through the hips, buttocks, and down each leg. Symptoms can include:

Sharp or burning pain in the leg
Numbness or tingling
Muscle weakness in the leg or foot
Difficulty walking or standing for long periods

The most common causes include:

Herniated or slipped discs pressing on nerve roots
Degenerative disc disease
Spinal stenosis (narrowing of the spinal canal)
Spondylolisthesis (slipping of a vertebra)

Most cases of sciatica improve with rest, physiotherapy, pain relief and lifestyle adjustments. Surgery is usually considered only when these measures fail.

What types of spinal surgery are used for sciatica?

The aim of surgery is to relieve pressure on the affected nerve and restore normal function. The type of surgery depends on the underlying cause:

Microdiscectomy – removal of a portion of a herniated disc pressing on a nerve root
Laminectomy – removal of part of the vertebra (lamina) to widen the spinal canal in cases of spinal stenosis
Foraminotomy – enlarging the openings where nerve roots exit the spine
Spinal fusion – stabilising the spine if instability or slippage is present

These procedures are typically performed under general anaesthesia and may be done using minimally invasive techniques to reduce recovery time.

Who is suitable for spinal surgery?

Surgery is usually considered for patients with:

Severe or persistent leg pain that does not improve with non-surgical treatments
Progressive muscle weakness or numbness
Loss of bladder or bowel control (urgent intervention required)
Symptoms affecting quality of life and daily activities

A careful assessment by a spinal surgeon is essential to determine whether surgery is appropriate and which procedure is most suitable.

What are the benefits and risks of surgery?

Spinal surgery can provide significant relief for sciatica symptoms, especially leg pain. Benefits include:

Reduction or elimination of leg pain
Improvement in mobility and function
Faster return to normal activities in some cases

However, like all surgery, there are risks:

Infection or bleeding
Nerve injury leading to numbness, weakness, or persistent pain
Recurrent disc herniation
Spinal instability in some cases

Most patients recover well, but outcomes vary depending on age, overall health, and severity of nerve compression.

What does recovery involve?

Recovery depends on the type of surgery and individual factors. General considerations include:

Short hospital stay, often a one night stay for minimally invasive procedures
Gradual return to normal activities over several weeks
Physiotherapy to strengthen the back and improve mobility
Avoiding heavy lifting and prolonged sitting in the early recovery period

Most patients notice relief from leg pain within days or weeks, while full recovery may take several months.

Are there alternatives to surgery?

Non-surgical treatment remains the first line for sciatica. Options include:

Pain relief with medications such as NSAIDs or neuropathic agents
Physiotherapy and targeted exercises
Epidural steroid injections to reduce inflammation
Lifestyle modifications including posture correction and weight management

Surgery is reserved for cases where these measures do not provide sufficient relief or when neurological deficits are present.

Spinal surgery can be an effective option for sciatica when conservative treatments fail. A specialist spinal assessment ensures that surgery is appropriate and tailored to the patient’s condition, with the goal of relieving pain and restoring function.