- Sciatica is a symptom, not a diagnosis: pain, tingling or numbness along the sciatic nerve, usually down the back of one leg [1]. In about nine in ten cases a disc is pressing on a nerve root in the lower back [2]; a tight piriformis muscle in the buttock is a much rarer cause [3].
- Some symptoms are emergencies. Sciatica in both legs, numbness around the genitals or anus, or new trouble controlling your bladder or bowels means A&E now, not a stretch [1].
- Most sciatica settles in a few weeks to a few months [1]. Staying active helps; sitting or lying still for long periods does not [1][2].
- Stretching helps when the problem is a tight muscle. When the nerve itself is irritated, long holds can make it worse, and gentle nerve glides have the better evidence [4][5].
- Every stretch here has one rule: a long, straight spine, mild tension in the muscle, nothing travelling down the leg. If a stretch sends symptoms further down, stop.
- FlexBuddy® belongs at the end of the story: a tall-spine hamstring stretch for muscular tightness once a clinician has cleared you, never a treatment for the nerve.
What sciatica is
The sciatic nerve is the largest nerve in the body [6]. It forms from nerve roots leaving the spine in the lower back, runs through the buttock beneath the piriformis muscle [3], then down the back of the thigh, where it supplies the hamstrings, before branching below the knee into the nerves of the calf and foot. Anything that squeezes or inflames it along that route produces the same symptoms: pain, tingling, numbness or weakness in the bottom, the back of one leg, and sometimes the foot and toes [1]. The leg pain is typically sharp or burning, often worse with movement, sneezing or coughing, and usually louder than any back pain with it [1]. The word says where it hurts, not why, and the why decides whether stretching is a good idea, a waste of time, or the thing making you worse. So: rule out the emergencies first, then work out what is irritating the nerve.
Stop and get help now if you have any of these
A small number of people with sciatica have pressure on the bundle of nerves at the bottom of the spinal canal, the cauda equina, which controls the bladder, bowel and the skin between the legs. It is rare, it is a surgical emergency, and the window for preventing permanent damage is short. The NHS lists these as reasons to go to A&E or call 999 immediately [1]:
- sciatica on both sides;
- severe or worsening weakness or numbness in both legs;
- numbness around or under the genitals, or around the anus (the "saddle" area; some people first notice a change in feeling when wiping);
- difficulty starting to pee, being unable to pee, or losing control of peeing, if this is new for you;
- not noticing when you need to poo, or losing control of your bowels, if this is new for you.
Do not drive yourself; get someone to take you or call an ambulance, and bring your medicines [1]. A change in how your genitals feel during sex, or new difficulty with erections, belongs on the same list [7].
Two further groups need a doctor rather than a stretching routine. Ask for an urgent GP appointment or call 111 if you feel hot, cold, shivery or generally unwell with your back pain, or if the pain is severe and started suddenly or is getting worse quickly [7]. See a GP, less urgently, for weight loss you did not intend, a lump or swelling in the back, pain that is worse at night or does not ease with rest, or pain that began after a serious accident [7]. Everything that follows assumes nothing on this list applies to you.
Sciatica is a symptom, not a diagnosis
Sciatica affects around 5 to 10% of people with low back pain, and disc-related sciatica occurs in about 2.2% of adults in a given year [2]. The nerve can be irritated in three broad places.
At the spine: a disc or a narrowed canal
In about 90% of cases, sciatica is caused by a herniated disc, the cushion between two vertebrae, pushing out and pressing on a nerve root as it leaves the spine [2]. A narrowed spinal canal, a slipped vertebra, disc degeneration and, rarely, growths can do the same [2][6]. The clues that point to the spine: leg pain greater than back pain, pain radiating to the foot or toes, numbness or pins and needles in the same strip of skin, and more leg pain when the straight leg is lifted [2]. That last one is the straight-leg-raise test; it is sensitive (91%) but not specific (26%), so on its own it proves little [2]. If this is your picture, read our guide to stretching with a herniated disc before anything below, and talk to a physiotherapist.
In the buttock: piriformis syndrome
The piriformis is a flat, narrow muscle running from the sacrum, through the buttock, to the top of the thigh bone, and the sciatic nerve most commonly passes directly beneath it [3]. When the muscle is tight, in spasm or inflamed, it can press on the nerve. This is the sciatica that stretching is designed for, and it is less common than people assume: Cleveland Clinic puts it at roughly 0.3 to 6% of low back pain [3]. It has been described for over 70 years and is still debated, because there is no definitive test and the literature is mostly case reports [8]. The latest systematic review found four features define it: buttock pain, pain made worse by sitting, tenderness near the greater sciatic notch (the deep point in the middle of the buttock), and pain on any manoeuvre that tightens the piriformis [9]. Straight-leg raising can be limited too, so that test does not separate the two causes [9].
Elsewhere: pregnancy, the hamstring, the hip
Pregnancy can bring on sciatica through posture change and ligaments that soften in preparation for labour [6][10]; a hamstring injury can irritate the nerve where it runs alongside the muscle; the hip joint can refer pain into the same area; and sometimes no cause is found [6]. Age, extra body weight, weak core muscles, jobs with heavy lifting or long periods of sitting, type 2 diabetes and smoking all raise the risk [6].
Nerve or muscle? How to tell before you stretch
A short muscle and an irritated nerve can both make the back of the leg feel "tight", but they behave differently when tested, and you can run the tests in two minutes.
| Check | Points to muscle | Points to nerve |
|---|---|---|
| Where you feel it | A broad pull in the belly of the muscle: back of the thigh, or deep in the buttock | A line that travels: buttock to calf, heel or toes, or a patch of skin that feels different |
| What it feels like | A dull stretching ache that eases the moment you release | Burning, electric, tingling, numbness; may linger after you stop |
| Cough, sneeze, strain | No change | Often sharpens the leg pain [1] |
| Pull the toes up during a hamstring stretch | Little or no change (the hamstring does not cross the ankle) | Symptoms increase down the leg |
| Drop the chin to the chest in the same stretch | No change | Symptoms increase (the nerve runs from the spine; tension at the top is felt at the bottom) |
| Sitting for a long time | Stiff on standing, loosens with a few steps | Pain builds while sitting, especially in the buttock [9] |
| One leg or both? | Usually both, roughly equal | Usually one (both at once is a red flag [1]) |
The two middle rows are the ones physiotherapists use. The hamstrings do not attach below the knee, so pulling the foot up should not change a muscular pull; it does lengthen the path of the sciatic nerve. If that small move sends the feeling further down the leg, the nerve is involved, and long holds are the wrong tool: stretching an irritated nerve like a muscle keeps it under tension. The evidence there supports gentle, rhythmic movement, the nerve glides below. If the tests point to muscle, the stretches are for you.
Does stretching help sciatica?
For back pain with leg symptoms, hamstring stretching helps. A 2024 systematic review pooled 14 randomised trials with 735 participants and found that hamstring stretching reduced pain in people with low back pain (standardised mean difference −0.72) and improved function on the Oswestry Disability Index (mean difference −6.97 points), though the trials varied a great deal [11]. In the subgroup whose back pain radiated into the leg, straight-leg-raise range improved markedly (standardised mean difference 2.39, with the trials in close agreement) [11]. That is a supervised programme improving leg range; it does not mean stretching fixes a disc. Our article on tight hamstrings and lower back pain goes through that review in detail.
For nerve-related pain, nerve mobilisation has the better evidence. A 2017 systematic review of 40 studies found that neural mobilisation reduced pain by about 1.8 points on a 10-point scale and disability by about 9 points on a 50-point scale in chronic low back pain [4]. A 2023 meta-analysis of 20 trials and 877 patients with lumbar radiculopathy, the medical name for sciatica from a nerve root, found large reductions in pain and disability, while warning about the mixed quality of the trials [5].
For long-standing sciatica, nobody can say what works best. A 2025 network meta-analysis of 50 trials and 4,920 people with sciatica of three months or more found exercise combined with neural mobilisation among the treatments with the largest short-term reductions in leg pain, but rated the confidence in every comparison as very low [12]. So: stretching and nerve glides are low-risk and reasonably supported for short-term relief; none of it is a cure, and what resolves most sciatica is time. In trials, about half of those given placebo were better within 10 days and three-quarters after four weeks, while up to 30% still had pain a year on [2].
The stretches that help (when the problem is a muscle)
Three rules. One: a long, straight spine. Rounding the lower back to reach further loads the disc and tensions the nerve; start lying down, where the floor holds the spine straight for you, and progress to sitting tall only when the lying version is easy and the leg is quiet. Two: mild tension in the muscle, never pain, never anything that travels down the leg; if symptoms spread, lower the leg, and if that does not fix it, go to the nerve-glide section instead. Three: the guideline dose is about 60 seconds of total stretch per exercise on at least two days a week [13], which can be two to four holds of 15 to 30 seconds [14]. Older adults may do better with longer holds; 60-second holds produced larger hamstring gains in one study of older adults [14].
| Stretch | Position | Hold | Reps | Notes |
|---|---|---|---|---|
| Knee to chest | On your back, one knee bent, hug it gently towards the chest | 20–30 s | 2–3 per side | The safest start; a flare-day stretch |
| Figure-4 (piriformis), lying | On your back, knees bent; cross one ankle over the opposite knee; hold the back of the other thigh and draw it towards you | 20–30 s | 2–3 per side | Feel it deep in the buttock; if it spreads down the leg or tingles, ease off or skip it today |
| Figure-4, seated | Sit tall, ankle on the opposite knee, hinge forward from the hips with a flat back | 20–30 s | 2–3 per side | Office version; stop if the buttock pain spreads |
| Gentle hamstring, lying | On your back, other knee bent, strap or towel round one foot; raise the straight leg to a mild thigh pull; back flat; toes relaxed | 20–30 s | 2–3 per side | Pulling the toes up turns it into a nerve test |
| Seated hamstring, straight spine | Sit tall, legs straight, strap or hands around the feet; tip the pelvis forward, chest lifted | 20–30 s | 2–3 | Only once the lying version is easy; the spine does not round |
| Hip-flexor lunge | Half-kneeling, back knee on a cushion; tuck the tailbone and shift forward until the front of the back hip pulls | 20–30 s | 2 per side | Opens the front of the hip after long sitting |
| Cat–Cow | On all fours, slowly round and then gently hollow the back with the breath | no hold | 8–10 slow | Movement, not a hold; calms a stiff back |
In bed
Everything in the table except the seated figure-4 and the lunge works on a firm mattress, and for mornings, flare days and anyone who finds the floor hard to reach, bed is the better place: knee-to-chest, the lying figure-4, the lying hamstring stretch with a strap or dressing-gown belt, then ten slow pelvic tilts. To get up, roll onto your side, push up with your arms and swing the legs down together. Our article on stretches you can do in bed has the full routine.
Nerve glides, explained
Neural mobilisation, also called nerve gliding or nerve flossing, is a movement-based technique that aims to restore normal movement in and around the nervous system [4]. A healthy nerve slides a few millimetres through the tissues around it as you move; an irritated one tends to stop sliding and start guarding. A glide moves the nerve gently back and forth along its path without stretching it, the way you ease a jammed drawer rather than yank it.
The common version for sciatica is the seated slider. Sit tall on the edge of a chair. Straighten one knee and, at the same time, lift your head to look at the ceiling; then bend the knee as you drop your chin to your chest. The two movements cancel out: straightening the knee pulls the nerve from the bottom while tipping the head back gives it slack from the top, so the nerve slides without being stretched. Slowly, 10 to 15 times, well short of pain. Lying down, the same idea: hold one thigh at 90 degrees with both hands and gently straighten and bend the knee, pulling the toes up only as the knee bends.
Glides are movements, not holds; hold the straight-knee position and it is a nerve stretch again. A familiar symptom that settles straight afterwards is acceptable; one that is worse ten minutes later means you did too much. The trials that showed benefit used programmes set up by physiotherapists [4][5], so have one show you your version, then do it at home.
What makes sciatica worse
- Stretching a sensitive nerve like a muscle. Long hamstring holds, toe-touches with a rounded back, yoga forward folds held "through the burn". If the feeling travels down the leg, it is a nerve under load, not a stretch.
- Bed rest. A few hours lying down may ease the pain but does not speed recovery, and prolonged rest is no longer recommended [2]. The NHS puts it bluntly: do not sit or lie down for long periods; movement is not harmful and can speed recovery even if it hurts [1].
- Sitting as a default. Long sitting is a risk factor for sciatica [6] and aggravates piriformis pain in particular [9]. Stand, walk, change position every half hour. If your sciatica is worst after a day at a desk, the lower back pain from sitting and tight hips from sitting guides are the next reads.
- Bouncing, forcing, and heavy lifting or repeated bending with a rounded back in the first weeks, which make irritated tissue guard harder and load the disc that may be the source [6].
- Ignoring the red flags. Weakness that is getting worse, numbness that is spreading, any bladder or bowel change: not a sign to stretch harder.
What tends to help meanwhile: keep up your normal activities as far as you can [1]; walk; use ice in the first few days and heat after that, each for around 20 minutes [6]. Ask a pharmacist about painkillers rather than guessing, because paracetamol is unlikely to help and the evidence for anti-inflammatories is unclear [1].
When to see someone
Immediately, for anything on the red-flag list. Within days if the pain is severe, a leg is becoming weak, or numbness is spreading. Otherwise, the NHS suggests seeing a GP if the pain has not improved after a few weeks of self-care, is getting worse, or is stopping your normal activities; in many areas you can refer yourself directly to an NHS musculoskeletal service [1]. A physiotherapist can do the nerve-versus-muscle tests properly, tell you which stretches fit, and set up nerve glides if needed. Scans are reserved for people with red flags or those being considered for injections or surgery, because most sciatica improves without either [2]. Most episodes settle within a few weeks to a few months [1], many within four to six weeks [6], and it can come back [1]. Sciatica still present at three months is the point at which a specialist opinion earns its place [12].
Doing this with FlexBuddy, once you have been cleared
FlexBuddy® is a stretching device, not a treatment for sciatica, and the order matters: red flags ruled out, a clinician's opinion that your leg pain is muscular tightness rather than an irritated nerve root, and the lying stretches above comfortable first. At that point you are left with the problem FlexBuddy was built for: stretching the hamstrings with the spine held long instead of rounded. Two beech-wood bars joined by an adjustable cotton strap; the foot bar goes under the soles, the hand bar in your hands, and you sit tall, lean back and tip the hips forward so the pull lands in the thighs and the lower back stays out of it. Start with the strap at its longest, keep the feet soft rather than flexed, hold for ten slow breaths and stop at mild tension. If anything travels down the leg, loosen a loop or put it away for the day. One trainer calls it "a great tool to help your clients maintain a neutral spine while stretching calves, hamstrings and lower back". Lifetime warranty, 30-day money-back guarantee. See FlexBuddy, or take the two-minute quiz.
Frequently asked questions
Does stretching help sciatica or make it worse?
Both are possible; it depends on what is irritating the nerve. If a tight piriformis or hamstring is the problem, gentle stretching with a straight spine helps [11]. If the nerve root itself is inflamed, long stretches keep it under tension and can make it worse; gentle nerve glides have the better evidence there [5]. A stretch that stays in the muscle is fine; one that sends burning or tingling down the leg is not.
What sciatica stretches can I do in bed?
Knee-to-chest, the lying figure-4 piriformis stretch, the lying hamstring stretch with a strap or belt around the foot, and slow pelvic tilts, each for 20 to 30 seconds or ten slow repetitions. Bed keeps the spine supported, which makes these the safest versions on a flare day. Avoid anything that needs you to sit up and fold forward.
Are sciatica stretches safe in pregnancy?
Gentle ones usually are: the NHS recommends the all-fours Cat–Cow, prenatal yoga and aquanatal classes for pregnancy back pain [10]. From 28 weeks, NHS advice is to sleep on your side rather than flat on your back [15], so use seated and side-lying versions of the figure-4 and skip the lying hamstring stretch late in pregnancy. Contact your midwife or GP urgently if back pain comes with fever, bleeding or pain on passing urine, or if you are in the second or third trimester, and go to A&E if you lose feeling in your legs, bottom or genitals [10].
Which sciatica stretches are best for elderly people?
The lying and seated versions, slowly, with longer and gentler holds: older adults may need longer stretch times than the usual 15 to 30 seconds, and 60-second holds produced greater hamstring gains in one study of older adults [14]. Knee-to-chest, the seated figure-4 on a firm chair and the lying hamstring stretch with a strap are the three to start with. Balance problems and osteoporosis change the picture, so a physiotherapist should set the routine if you have either.
Does stretching hamstrings help sciatica?
It can, when the hamstring is part of the problem. In a 2024 meta-analysis, people whose back pain radiated into the leg improved their straight-leg-raise range after hamstring stretching programmes [11]. The condition is a straight spine, a relaxed foot and no symptoms running down the leg; pull the toes up during the stretch and it becomes a nerve stretch, with different rules.
How do I do a piriformis stretch for sciatica?
Lie on your back, cross one ankle over the opposite knee, and draw that thigh gently towards your chest until you feel a deep pull in the buttock of the crossed leg. Hold 20 to 30 seconds, two or three times per side; seated, it is the same shape on a chair, hinging forward with a flat back. If your pain does not fit the piriformis picture (buttock pain, worse sitting, tender in the middle of the buttock) [9], the stretch may not be the right tool.
This article is general information, not medical advice. Tight muscles usually respond well to regular stretching. If your pain is sharp, radiates down a leg, comes with numbness, weakness, fever, bladder or bowel changes, follows an injury, or keeps getting worse, see a doctor or physiotherapist before you stretch.
References
- NHS. Sciatica. nhs.uk, page last reviewed 3 Dec 2024. https://www.nhs.uk/conditions/sciatica/ (accessed 4 Nov 2026).
- Koes BW, van Tulder MW, Peul WC. Diagnosis and treatment of sciatica. BMJ. 2007;334(7607):1313–1317. doi:10.1136/bmj.39223.428495.BE. https://pmc.ncbi.nlm.nih.gov/articles/PMC1895638/ (accessed 4 Nov 2026).
- Cleveland Clinic. Piriformis Syndrome. Last reviewed 13 Jul 2022. https://my.clevelandclinic.org/health/diseases/23495-piriformis-syndrome (accessed 4 Nov 2026).
- Basson A, Olivier B, Ellis R, Coppieters M, Stewart A, Mudzi W. The effectiveness of neural mobilization for neuromusculoskeletal conditions: a systematic review and meta-analysis. J Orthop Sports Phys Ther. 2017;47(9):593–615. doi:10.2519/jospt.2017.7117
- Lin LH, Lin TY, Chang KV, Wu WT, Özçakar L. Neural mobilization for reducing pain and disability in patients with lumbar radiculopathy: a systematic review and meta-analysis. Life (Basel). 2023;13(12):2255. doi:10.3390/life13122255
- Cleveland Clinic. Sciatica. Last updated 10 Feb 2026. https://my.clevelandclinic.org/health/diseases/12792-sciatica (accessed 4 Nov 2026).
- NHS. Back pain. nhs.uk, page last reviewed 5 Mar 2026. https://www.nhs.uk/conditions/back-pain/ (accessed 4 Nov 2026).
- Hopayian K, Song F, Riera R, Sambandan S. The clinical features of the piriformis syndrome: a systematic review. Eur Spine J. 2010;19(12):2095–2109. doi:10.1007/s00586-010-1504-9
- Hopayian K, Danielyan A. Four symptoms define the piriformis syndrome: an updated systematic review of its clinical features. Eur J Orthop Surg Traumatol. 2018;28(2):155–164. doi:10.1007/s00590-017-2031-8
- NHS. Back pain in pregnancy. nhs.uk, page last reviewed 10 Jan 2024. https://www.nhs.uk/pregnancy/related-conditions/common-symptoms/back-pain/ (accessed 4 Nov 2026).
- Gou Y, Lei H, Chen X, Wang X. The effects of hamstring stretching exercises on pain intensity and function in low back pain patients: a systematic review with meta-analysis of randomized controlled trials. SAGE Open Med. 2024;12:20503121241252251. doi:10.1177/20503121241252251
- Zhu Z, Schouten T, Strijkers R, Koes B, Gerger H, Chiarotto A. Effectiveness of non-surgical interventions for patients with chronic sciatica: a systematic review with network meta-analysis. J Pain. 2025;33:105431. doi:10.1016/j.jpain.2025.105431
- Garber CE, Blissmer B, Deschenes MR, et al.; American College of Sports Medicine. Position stand: quantity and quality of exercise for developing and maintaining cardiorespiratory, musculoskeletal, and neuromotor fitness in apparently healthy adults. Med Sci Sports Exerc. 2011;43(7):1334–1359. doi:10.1249/MSS.0b013e318213fefb
- Page P. Current concepts in muscle stretching for exercise and rehabilitation. Int J Sports Phys Ther. 2012;7(1):109–119. https://pmc.ncbi.nlm.nih.gov/articles/PMC3273886/ (accessed 4 Nov 2026).
- Countess of Chester Hospital NHS Foundation Trust. Safe sleep during pregnancy. https://coch.nhs.uk/all-services/maternity-services/your-pregnancy/safe-sleep-during-pregnancy.aspx (accessed 4 Nov 2026).
