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Pinched Nerve in the Lower Back: Symptoms, Recovery Time and Treatment

A pinched nerve in the lower back happens when one of the nerve roots leaving the lumbar spine is irritated or compressed, most often by a disc bulge. Doctors call it lumbar radiculopathy, and it is the usual cause of sciatica: pain that travels from the back or buttock down the leg, sometimes with numbness, tingling or weakness. It can be very painful, but most people recover within weeks to a few months without surgery.

Topic
Physical therapy
Updated
Reading time
5 minutes
Reviewed by
Dr. Itziar Gotxi Erezuma · Medical doctor (ENT) · Bizkaia Medical Association no. 484809757

What a pinched nerve in the lower back means

The lower spine has five lumbar vertebrae separated by discs. Nerve roots leave the spinal canal at each level and join to form the sciatic nerve and other nerves of the leg. When a disc bulges or herniates, or when the canal or side openings narrow, a nerve root can be squeezed and become inflamed; doctors call this lumbar radiculopathy. The pain is felt along the path of that nerve, so a problem in the back can be felt mostly in the buttock, thigh, calf or foot.

Not all back pain involves a nerve. Muscle or ligament strain causes local back pain without the typical leg symptoms; see lower back strain.

Symptoms of a pinched nerve

  • Sharp, burning or shooting pain from the buttock down the back or side of the leg, often below the knee.
  • Leg pain that is worse than the back pain.
  • Pins and needles or numbness in the leg or foot.
  • Weakness, for example difficulty standing on tiptoe or lifting the front of the foot (foot drop).
  • Pain worse with sitting, coughing, sneezing or bending forward.
  • Usually on one side only.

Common causes

  • Herniated (slipped) disc: the most common cause in people aged 30 to 50.
  • Lumbar spinal stenosis: narrowing of the spinal canal in older adults, causing leg pain and heaviness when walking that eases on sitting or bending forward.
  • Spondylolisthesis: one vertebra slipping forward on another.
  • Foraminal narrowing: bony spurs or thickened joints narrowing the exit of a nerve.
  • Muscle-related buttock pain: piriformis-related pain can mimic sciatica; see piriformis syndrome.
  • Rare causes: infections, tumours or fractures, usually with other warning signs.

How long it lasts

The outlook is good. Most people feel clearly better within 6 to 12 weeks, and studies show that many disc herniations shrink or are reabsorbed over months, especially large ones. Pain usually improves first; numbness and minor weakness can take longer. Recurrences happen, but staying fit and active lowers the risk. Persistent symptoms beyond three months deserve a review of the diagnosis and treatment plan.

Treatment options

  • Stay active: keep walking and doing daily activities as much as pain allows; bed rest slows recovery.
  • Pain relief: anti-inflammatory medicines if suitable. NICE advises against routinely using gabapentin-type medicines, other antiepileptics, oral steroids or benzodiazepines for sciatica, and against opioids for long-term pain.
  • Exercise programme: guided by a physiotherapist, sometimes combined with manual therapy and psychological support as part of a package.
  • Epidural steroid injection: may be considered for acute, severe sciatica.
  • Surgery (discectomy or decompression): for severe or progressive weakness, or disabling pain that does not improve with good non-surgical care. It speeds up relief of leg pain but long-term results are similar for many people.

Movements and exercises that often help

  • Walking: short, frequent walks are one of the best things you can do.
  • Knee rolls: lying on your back with knees bent, let the knees roll gently from side to side, 10 times.
  • Single knee to chest: gently draw one knee towards the chest, hold for 20 seconds, 3 times each side, if comfortable.
  • Prone press-ups: lying on your stomach, gently push up on your forearms; some people with disc problems find this centralises the pain.
  • Nerve glides: gentle movements of the leg and head taught by a physiotherapist.

A useful rule: exercises that move the pain from the leg towards the back are usually helpful; those that push pain further down the leg should be stopped. More options in sciatica stretches.

Sitting, sleeping and working

  • Change position at least every 30 minutes and avoid long periods of slumped sitting.
  • Use a small cushion or rolled towel behind the lower back when sitting.
  • Sleep on your side with a pillow between the knees, or on your back with a pillow under the knees.
  • Lift close to the body, bending the knees and avoiding twisting while lifting.
  • Return to work early with adjusted duties if possible; it supports recovery.

Emergency warning signs

  • Numbness or tingling around the genitals, buttocks or inner thighs (saddle area).
  • New difficulty passing urine, incontinence, or loss of bowel control.
  • Weakness or numbness in both legs.
  • Rapidly worsening weakness, such as a new foot drop.
  • Back pain with fever, unexplained weight loss, a history of cancer, or after a significant fall.

The first three can be signs of cauda equina syndrome, a compression of the nerves at the bottom of the spine that needs emergency surgery. Go to the emergency department immediately.

Key points to remember

  • A pinched nerve in the lower back causes sciatica-type leg pain, tingling or weakness.
  • A herniated disc is the most common cause, and many shrink on their own.
  • Staying active and exercise-based physiotherapy are the main treatments.
  • Saddle numbness, bladder or bowel changes or weakness in both legs are an emergency.

Questions about a pinched nerve in the lower back

These answers are general information and do not replace an examination or individual medical advice.

How long does a pinched nerve in the lower back last?

Most people improve significantly within 6 to 12 weeks. Some symptoms, such as numbness, can take longer.

Is walking good for a pinched nerve in the lower back?

Yes. Regular short walks keep the spine moving and support recovery. Rest only briefly if pain is severe.

Can a pinched nerve heal on its own?

Often, yes. Inflammation settles and many disc herniations shrink over time without surgery.

When is surgery needed?

For cauda equina syndrome, worsening weakness, or severe leg pain that does not improve after good non-surgical treatment.

What is the difference between sciatica and a pinched nerve?

Sciatica describes the leg pain; a pinched nerve root in the lower back is its most common cause.

Should I see a physiotherapist?

Yes. A physiotherapist can confirm the likely cause, design an exercise plan and advise on daily activities.

Sources

  1. NICE NG59 · Low back pain and sciatica in over 16s
  2. NHS · Sciatica
  3. NHS · Slipped disc
  4. Jensen RK, et al. Diagnosis and treatment of sciatica. BMJ. 2019
  5. Chiu CC, et al. The probability of spontaneous regression of lumbar herniated disc: a systematic review. Clin Rehabil. 2015

This guide is for general information and does not replace medical advice. How a problem is diagnosed and treated depends on your examination and medical history. If you think you have an emergency, contact your local emergency services.