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Overview

What Is Sciatica?

Sciatica is pain caused by irritation, inflammation, or compression of the sciatic nerve. This large nerve travels from the lower back through the buttock and down the back of each leg. Sciatica usually affects one side of the body and may cause pain, tingling, numbness, or weakness along that pathway. It is most often related to changes in the lower spine, although anyone can develop it.

Symptoms

Sciatica Symptoms

Sciatica symptoms can range from mild to severe and may travel from the lower back or buttock down the leg. Some people feel mainly pain, while others notice changes in sensation or muscle strength.

  • Pain that radiates from the lower back or buttock down the leg.
  • Burning, shooting, or electric-like pain.
  • Tingling or pins-and-needles sensations (paresthesia).
  • Reduced feeling or numbness in the buttock, leg, or foot.
  • Muscle weakness in the leg or foot.
  • Pain that worsens with coughing, sneezing, sitting, or certain movements.

Causes

What Causes Sciatica?

Sciatica occurs when a nerve root in the lower spine, or part of the sciatic nerve itself, becomes irritated, inflamed, or compressed. The pressure can result from changes in the spinal disks, joints, bones, or surrounding tissues.

  • A herniated or bulging disk can press on a nerve root in the lower spine and cause sciatica pain.
  • Bone spurs caused by arthritis can narrow the space around spinal nerves and irritate them.
  • Lumbar spinal stenosis can narrow the spinal canal or nerve passages, sometimes affecting the sciatic nerve.
  • Spondylolisthesis occurs when one vertebra slips forward and may put pressure on a nerve.
  • Less common causes include a spinal injury, infection, or tumor.

Risk Factors

Sciatica Risk Factors

  • Age-related changes in the disks, joints, and bones of the spine can increase risk and cannot be changed.
  • A previous back injury may make future nerve irritation more likely.
  • Physically demanding work involving repeated lifting, twisting, or vibration may increase strain on the lower back.
  • Prolonged sitting, especially with poor back support, may contribute to back and nerve irritation and can often be modified.
  • Obesity can place additional stress on the spine; weight management may help reduce this risk.
  • Low physical activity can weaken the muscles that support the back and is a modifiable risk factor.
  • Diabetes can increase nerve vulnerability, so managing blood sugar with a clinician may help protect nerve health.
  • Smoking may harm spinal disk health and is a modifiable risk factor.

Complications

Sciatica Complications

Many cases of sciatica improve with time and appropriate care. However, untreated or severe nerve compression can cause persistent pain, reduced mobility, disrupted sleep, or lasting weakness in the leg or foot.

Seek urgent care

Recognize serious nerve symptoms

Seek urgent medical evaluation for new or worsening leg weakness, loss of bladder or bowel control, numbness around the groin or inner thighs, or symptoms affecting both legs. These can indicate significant nerve compression that needs prompt assessment.

Diagnosis

How Sciatica Is Diagnosed

A clinician usually diagnoses sciatica by reviewing your symptoms and medical history and performing a physical examination. They may check where the pain travels, muscle strength, sensation, reflexes, walking, and movements such as a straight-leg raise. These findings help identify nerve involvement and guide decisions about further testing.

  • An MRI or other imaging may be ordered when symptoms are severe, persistent, worsening, or suggest a significant structural problem.
  • Routine imaging is not always needed for uncomplicated sciatica symptoms that are expected to improve with conservative care.
  • Nerve conduction studies or electromyography may help assess nerve function when the diagnosis is unclear or weakness persists.
  • Blood tests may be considered when symptoms suggest an infection, inflammatory condition, or another medical cause.

Treatment & Management

Sciatica Treatment and Management

Sciatica treatment depends on the severity and cause of symptoms, how long they have lasted, their effect on daily activities, and whether weakness or other nerve changes are present. The goal is to reduce pain, support movement, and treat the source of nerve irritation.

  • Staying gently active and continuing usual activities as tolerated is often preferred to prolonged bed rest.
  • Short-term heat or cold may provide temporary relief, depending on which feels more helpful.
  • Clinician-approved pain medicines may reduce discomfort when used only as directed.
  • Physical therapy can improve movement and strengthen muscles that support the back and hips.
  • Individualized sciatica stretches and exercises may help, but they should be chosen according to symptoms and physical findings.
  • An epidural steroid injection may be considered for selected people with persistent or severe nerve-related pain.
  • Surgery may be recommended for persistent disabling symptoms or significant nerve compression, especially when weakness or other neurologic changes are present.

For short-term relief

Use self-care safely

Avoid prolonged bed rest and change positions regularly. Use medicines only as directed, and stop an exercise that worsens radiating pain or causes increasing weakness. If pain does not improve or interferes with normal activities, contact a healthcare professional about sciatica pain relief options.

Prevention

Can Sciatica Be Prevented?

Sciatica cannot always be prevented, but regular activity, strong core and back muscles, healthy weight management, safe lifting, and good ergonomic positioning may lower the risk. Avoiding tobacco may also support spinal and nerve health.

  • Take regular movement breaks if you sit for long periods.
  • Learn and use proper lifting technique, keeping the load close and avoiding twisting while lifting.
  • Progress exercises gradually rather than suddenly increasing intensity or weight.
  • Ask a clinician or physical therapist which stretches and exercises are appropriate after a sciatica episode.
  • Use a supportive sitting and work setup that allows comfortable back and leg positioning.

Outlook and Prognosis

Sciatica Outlook and Prognosis

Many sciatica episodes improve within several weeks with appropriate activity and care. Recovery can take longer when there is substantial nerve compression or an underlying spinal condition. Symptoms may also recur, so treating contributing factors and following an individualized management plan can be important.

When Should You See a Doctor

When Should You See a Doctor for Sciatica?

  • Arrange medical care if pain is severe, worsening, recurrent, or not improving with self-care.
  • Seek evaluation for back or leg pain after significant trauma.
  • Contact a clinician if pain occurs with fever or unexplained weight loss.
  • Arrange prompt assessment for new or increasing leg weakness.
  • Seek medical advice if pain or weakness makes walking difficult.

Get emergency help

Act quickly for emergency warning signs

Go to an emergency department for loss of bladder or bowel control, numbness in the saddle area around the groin or inner thighs, or rapidly worsening weakness in one or both legs.

Symptoms

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