Sciatica: Causes, Symptoms, Exercises and How to Get Relief

What sciatica is

Sciatica is leg pain caused by irritation or compression of one of the nerve roots that join to form the sciatic nerve, the thick nerve running from your lower back through the buttock and down the back of the leg. The word describes a mechanism rather than naming a single condition, which is why the useful question is what is irritating the nerve in your case.

Symptoms: is it really sciatica?

Not all back pain that reaches the buttock is sciatica, and the distinction changes the plan. Features that point to genuine nerve-root irritation:

• Leg pain in a band or line down the back or side of one leg, sometimes reaching the calf or foot, rather than a general ache across the lower back.
• Leg pain worse than back pain, which is a genuinely useful clue, since most non-specific back pain is felt mainly in the back.
• Numbness, tingling or altered sensation in that same leg pattern.
• Burning, shooting or electric quality rather than a dull ache.
• Aggravation by coughing, sneezing or straining, which raises pressure around the nerve root.
• Genuine weakness in a specific movement, such as a foot that will not lift properly. This is more significant than pain and always deserves assessment.

If your pain stays mostly in the back, the guide to lower back pain relief covers that pattern instead.

Red flags: when it is an emergency

The overwhelming majority of sciatica is not dangerous. One rare cause, cauda equina syndrome, is a compression of the bundle of nerves at the base of the spinal cord and needs same-day emergency care, because delay can cause permanent damage. Go to A and E immediately, rather than waiting for a GP appointment, if you notice:

• Numbness around the saddle area, meaning the inner thighs, genitals or around the back passage.
• New difficulty controlling your bladder or bowel, including retention, incontinence or loss of sensation.
• Pain, numbness or weakness in both legs rather than one.
• New sexual dysfunction alongside any of the above.

Also seek prompt assessment for progressive weakness in one leg, a fever with back pain, unexplained weight loss, or a history of cancer with new back pain.

Getting relief now

• Find your relieving position. Lying on your back with knees bent and calves resting on a chair takes pressure off many irritated nerve roots. Others find side-lying with a pillow between the knees works better. Use whichever settles the leg.
• Change position often. Twenty to thirty minutes in any one position is usually the limit early on, and sitting is frequently the least comfortable.
• Heat for muscle guarding around the back, and ice if the area feels hot and irritable. Either is for comfort.
• Keep walking little and often, even a few minutes at a time, since movement is better tolerated than most people expect.
• Medication. NICE guideline NG59 supports considering an anti-inflammatory at the lowest effective dose for the shortest time, and specifically recommends against gabapentinoids, other antiepileptics, oral corticosteroids and benzodiazepines for sciatica. Speak to a pharmacist or GP about what suits you.
• Sleeping. Side-lying with a pillow between the knees, or on your back with a pillow under the knees, suits most people. A firm mattress is not universally better, so use what allows you to sleep.

Exercises for sciatica

There is no universal sciatica exercise. The right choice is whichever direction eases your leg symptoms, which is why finding your directional preference matters more than any specific stretch. A useful rule as you try these: movements that reduce or centralise the pain towards your back are good signs, while movements that push pain further down the leg should be stopped.

1. Sciatic nerve glide (flossing). Sit upright with the affected leg's knee bent. Straighten the knee while tilting your head back, then bend the knee while tucking your chin. Ten slow repetitions, twice daily. This should feel like a light pull rather than a stretch, and it should not leave you sore.
2. Prone press-up, for those who prefer extension. Lie face down, hands under your shoulders, and press your chest up while keeping the hips down. Ten repetitions. Stop if leg pain increases.
3. Knee to chest, for those who prefer flexion. Lying on your back, draw one knee towards your chest and hold for 20 seconds. Common in stenosis-pattern symptoms.
4. Piriformis stretch. Lying on your back, cross the affected ankle over the opposite knee and gently pull the underneath thigh towards you. Hold 30 seconds.
5. Pelvic tilts and dead bugs for gentle trunk control without loading the spine.
6. Walking, built up gradually. It is the most underrated treatment on this list.

Once symptoms are settling, progress to the staged strengthening in the exercises for lower back pain guide and the trunk work in core strengthening exercises, since a stronger, better-conditioned back tolerates far more.

Staying active, and why scans usually wait

A Cochrane review comparing bed rest with staying active for acute low back pain and sciatica found no advantage to bed rest, and extended time in bed carries its own costs in deconditioning and stiffness. NICE NG59 reflects the same conclusion: stay as active as symptoms reasonably allow.

On imaging, NG59 is explicit that scans should not be routinely offered in a non-specialist setting for low back pain with or without sciatica, because scan findings are common in people with no pain at all and rarely change early management. Imaging earns its place when red flags are present or when a specialist is genuinely weighing surgery.

Recovery timeline and what happens if it persists

If leg symptoms persist beyond six to twelve weeks despite genuine conservative treatment, the next steps usually involve specialist review, imaging, and a discussion of options such as a nerve root injection or, in a minority, surgery. Progressive weakness moves that conversation forward much sooner.

Three misconceptions worth clearing up

• "I need a scan to know what is wrong." For most sciatica the story and examination give the answer, and imaging is reserved for red flags or when it would change the plan.
• "Bed rest will let it heal." The evidence points the other way, and staying appropriately active avoids the deconditioning that makes recovery harder.
• "Any leg pain is sciatica." Plenty of leg pain is referred from the back, hip or other structures without nerve-root involvement. The banded pattern and the sensory changes are what confirm it.

FAQ: sciatica

How long does sciatica last?

Most people improve substantially within four to six weeks. A smaller group has a longer course, and persisting leg symptoms beyond about twelve weeks are worth a specialist review.

What is the fastest way to relieve sciatica pain?

Find the position that eases the leg, usually lying with the knees supported, keep moving in short bursts, use heat or ice for comfort, and consider a short course of anti-inflammatories if suitable for you. Relief comes from position and movement rather than any single stretch.

Should I rest or stay active?

Stay active within comfort. Brief rest positions are fine, and bed rest offers no advantage and slows the return to normal function.

What exercises should I avoid with sciatica?

Anything that pushes pain further down the leg, plus heavy loaded bending and twisting early on. Sit-ups and deep forward folds often aggravate disc-related symptoms.

What is the best sleeping position for sciatica?

Side-lying with a pillow between the knees, or on your back with a pillow under the knees. Avoid sleeping face down, which extends the lower back all night.

Do I need a scan?

Usually not early on. NICE reserves imaging for red flags or when a specialist is considering surgery.

Can sciatica go away on its own?

Frequently, yes. The nerve irritation settles over weeks in most cases, and staying active and conditioned makes that process faster and recurrence less likely.