A deep pain inside the buttock, which gets worse when you stay seated for a long time, drive or cross your legs, and which sometimes runs down the back of the thigh: this is the picture that leads to suspecting piriformis syndrome, that is, irritation of the sciatic nerve where it passes in contact with a small deep muscle of the hip.
Before going into detail, one thing needs saying that almost no article mentions: this label has been debated for decades and has no test that proves it. The literature consists mostly of case reports and narrative reviews, and the most up-to-date systematic review on clinical signs concludes that the accuracy of the physical tests used to recognise it cannot be established from the available studies. This does not mean your pain is not real or that there is nothing to be done. It means it should be treated as a working hypothesis, not a certainty, and that the plan needs a moment where you stop and ask whether the hypothesis holds.
⚠ Important: read this before continuing
The exercises and advice in this article are general guidance and may not suit your situation. Every person has a unique clinical history: what works for others could be counterproductive for you.
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First of all: the signs that should not be managed with exercises
It is often called false sciatica, because the pain resembles that of a root compressed in the back but originates in the buttock: this is the reason why the wrong area is often treated.
Pain in the buttock that runs down the leg is almost always benign, but the same area can harbour conditions that require a doctor rather than a programme of stretches. It is worth reading them now, not at the end.
- Weakness in the foot or leg that worsens over days, for example difficulty lifting the toes or climbing stairs.
- Numbness in the area in contact with the saddle, the inner thighs, perineum, or difficulty controlling urine or stools: this is an emergency, go to the emergency room.
- Pain that appeared after a significant trauma, a fall onto the buttock or an accident.
- Constant night pain that does not change in any position, especially if accompanied by fever, general malaise or unintended weight loss.
- Swelling, heat and pain in the calf, which must be ruled out before blaming everything on a hip muscle.
- A recent spine or pelvis surgery, or an oncological history: the picture needs to be reviewed by whoever has been following you.
One figure helps to show how sensible this caution is. In the systematic review of published cases of piriformis syndrome, published in 2025, out of 212 patients gathered from 97 articles, 9.0% (19 of 212) had a failed lumbar spine operation in their history, and among the causes identified after treatment there were anatomical variants, muscle hypertrophy and even pyomyositis, that is, muscle infections. It must be read through the right lens: these are cases selected for publication, so the more severe and complicated ones, and they do not represent the average person with buttock pain. But they clearly show that very different things end up under the same label.
The muscle, the nerve and how close they really are
The piriformis is a flat, deep muscle that runs from the sacrum to the upper part of the femur. Its job is to rotate the hip externally and stabilise the pelvis when you are standing on one leg: walking, running, stairs.
The critical point is the proximity: the sciatic nerve leaves the pelvis precisely in that region. Here the numbers exist and they are good. A meta-analysis of 45 anatomical studies and 7,068 lower limbs found that in 85.2% of cases the nerve exits as a single trunk below the muscle, while in 9.8% it already divides inside the pelvis, with the common peroneal nerve piercing the piriformis and the tibial nerve passing beneath it. Overall the course departs from the usual one in almost 15% of cases.
It is an interesting figure, but it must be handled honestly, and with the right unit of measurement: that 15% is calculated on the limbs examined in anatomical studies, not on people who have pain. An atypical course therefore concerns about one limb in seven, whereas buttock pain is not so widespread. Having the nerve pierce the muscle is not enough to explain a symptom, and not having it rules nothing out. Rather, it serves as a reminder that this region is crowded.
In recent years, orthopaedic literature has in any case stopped reasoning about a single muscle. People speak of deep gluteal syndrome: compression of the sciatic or pudendal nerve by non-disc pelvic structures, which includes piriformis syndrome but also involvement of the gemelli and obturator internus, ischiofemoral impingement and suffering at the attachment of the hamstrings. This changes little for the initial exercises, but it explains why your pain may resemble what is described here and have a slightly different origin.
What usually puts this region under strain:
- sitting for many hours, especially on hard surfaces or with a wallet in the back pocket;
- rapid increases in load: running distance that has grown too quickly, resuming activity after a break, hills and trails. This is not a locker-room impression: in the review of published cases, 38.2% of patients had a history of direct or indirect pelvic trauma or overloading of the muscle from intense physical or sporting activity;
- direct blows to the buttock, such as a fall;
- weakness of the gluteus medius and maximus: if the main muscles are not doing their job, the small deep rotators are left to work overtime. It is a sensible mechanical reasoning, not a proven law;
- changes in movement linked to other problems, such as a stiff ankle or a painful knee, which shift the load onto the hip.
Symptoms: what recurs in the cases described
Two systematic reviews by the same lead author, from 2010 and 2018, did something useful: instead of chasing the mechanism, they counted which signs recur in the published cases. What emerged was a small restricted group of features: pain in the buttock, worsening of the pain when sitting, tenderness on external palpation near the sciatic notch, and pain appearing with manoeuvres that increase tension in the muscle. The 2018 version adds limitation of the straight-leg-raise test, and specifies that a normal straight-leg raise does not rule out the diagnosis.
The limitation is declared by the authors themselves: these are frequencies observed in people who had already been given a diagnosis of piriformis syndrome, not proof that those signs can distinguish who has the problem from who has sciatica of lumbar origin. In practice this means these elements point in a direction, they do not certify anything.
The other side of the coin should also be mentioned, which the authors themselves put in writing: that piriformis involvement can cause sciatica is considered demonstrated, and the four recurring signs are enough to define the picture. What is missing is the rest: how common it is among people with back pain and sciatica, and how well those signs really recognise it. It is therefore not an invented condition: it is a condition without confirmatory proof.
In your everyday experience it usually shows up as a pain felt deep, inside the buttock, often on one side only; a worsening after a quarter of an hour or twenty minutes seated, in the car or at the desk (this is the recurring description from patients, not a threshold measured in a study); discomfort when you cross your leg or rotate the hip; and a pain which, when it radiates, tends to stop mid-thigh without going down to the foot.
How it differs from sciatica that comes from the back
The most important differential diagnosis is with lumbar sciatica from a disc problem, because the treatment changes. The table below summarises the trends, not the rules.
| Gluteal origin (piriformis) | Lumbar origin (disc/root) | |
|---|---|---|
| Where it hurts most | In the buttock, deep inside | At the bottom of the back, then down the leg |
| How far it goes | Usually the thigh, rarely past the knee | Often down to the calf or foot |
| What worsens it | Sitting, rotating the hip, getting into a car | Bending forward, coughing, sneezing, standing still |
| Tingling and weakness | Rare and subtle | More frequent, with a defined area |
| What gives relief | Standing up, walking, unloading the buttock | Changing position, often extending the back |
This table does not replace an assessment: the two pictures can coexist, and it is common for buttock pain to be the tail of a lumbar problem that was never resolved. In the orthopaedic review on deep gluteal syndrome, the recommended order is exactly this: first the spine lesions are excluded, and only then does an MRI of the pelvis become useful for finding what is compressing the nerve. If your pain starts from the back, you will find the right approach in the exercises for sciatica.
What the evidence really says about treatment
Precision is needed here, because this is where the most imagination gets read into the literature.
The 2023 systematic review of treatments for deep gluteal syndrome selected 13 studies out of 909 records, for a total of 508 patients: 8 randomised trials with 336 patients and 5 case series with 172. Only three of those trials reached the minimal clinically important difference for pain, and only one for disability; the five surgical studies did exceed that threshold, but in a before-and-after comparison, that is, without a control group. The overall quality of the evidence is rated low, and the conclusion is clear: no conservative treatment can be recommended over another, and for first-line care the review refers to the general guidelines on back pain and sciatica, that is, to physiotherapy; surgery may have a place in chronic cases.
Two details that usually disappear when the review is cited. The first: the conservative treatments compared in those randomised trials were injections (corticosteroids, botulinum toxin, tiocolchicoside, colchicine), not exercise programmes. Specific exercise for this region is exactly where the comparisons are missing, and that is different from saying it does not work. The second concerns the randomised trial that is often brought up as evidence in favour of stretching: 102 patients with low back pain attributed to the piriformis, divided into two groups. That trial, however, did not test stretching, it tested neural therapy, that is, six sessions of injections performed by the doctor; the piriformis stretching exercises were received by all participants, in both groups, as baseline treatment. Pain and disability improved on both sides, with a more marked improvement in those who also received the injections. Without an arm without exercise, the improvement cannot be credited to stretching: here too, exercise is the background of the study, not its subject.
The honest way to read all this is that the programme below is a reasonable, low-risk bet, consistent with what the guidelines recommend for sciatica in general, not a proven cure for an entity that, strictly speaking, does not even have a diagnostic test.
The programme in three parts
When in doubt about what to do when piriformis syndrome is suspected, the most common mistake is reducing everything to stretching. Stretching gives temporary relief, but if the muscle is overloaded because the glutes are not holding, the relief lasts until the next day. Three ingredients are needed together: something that reduces the sensitivity of the area, something that restores movement to the hip, and something that builds strength.
An important tip: before trying these exercises, make sure you have received a correct diagnosis. We often think we have one problem, but the real cause of the pain is another. Doing the wrong exercises can make the situation worse instead of better.
| Exercise | How to do it | Dosage |
|---|---|---|
| Figure-4 stretch (supine) | Lying on your back, right ankle on top of the left knee. Hold the left thigh and draw it towards you until you feel tension in the right buttock. Never sharp pain | 30-40 seconds, 3 times per side, 1-2 times a day |
| Hip mobility in rotation | Seated on the floor, knees bent and apart, slowly let the knees fall to one side and the other without forcing | 10 slow swings per side |
| Clamshell | On your side, knees bent at 90°, heels together: open the upper knee without letting the pelvis roll back | 2-3 sets of 12-15 per side |
| Glute bridge | Supine, feet on the floor: lift the pelvis pushing through your heels, squeeze the glutes at the top for 2 seconds | 3 sets of 12 |
| Side abduction | On your side, upper leg straight, lift it about 30 cm keeping the foot slightly rotated downwards | 2-3 sets of 12-15 per side |
| Side-stepping walk with band | Band above the knees, half squat, side steps keeping the tension | 3 sets of 10 steps per direction |
The dosages are reasonable conventions of clinical practice, not numbers taken from a study on this condition: use them as a starting point and adjust them to the response the next day. The one rule that matters is this: during and after the exercise you can accept a discomfort that stays local and fades within a few hours, but not a pain that keeps radiating further down the leg.
To these must be added the less showy and more decisive part: changing the conditions that feed the problem. Standing up every half hour if you work seated, taking the wallet out of the back pocket, raising the seat slightly in the car, temporarily reducing uphill running or recently increased volumes without stopping altogether. It is the part nobody talks about because it does not sell well, and it is the part that in practice shifts things the most.
In practice the first two weeks serve to calm the symptoms, and then the strengthening work should be increased progressively, because that is what makes the result stable: again, this is a clinical convention and not a milestone measured in a study on this condition. There is no proven time within which this approach must work, but a practical criterion is still useful: if after 4 to 6 weeks done regularly nothing has changed, the starting hypothesis should be questioned instead of being repeated more forcefully.
Exercises to avoid with piriformis syndrome (and other mistakes)
- Aggressive and frequent stretching. On an already irritated nerve, pulling hard feeds the symptom. The rule is tension, never pain that radiates.
- Ball or foam roller pressed for a long time on the most painful point. Moderate pressure can help; insisting along the course of the nerve usually does not.
- Absolute rest. Inactivity is the wrong response: walking, even little and often, is almost always better than the sofa, and it is consistent with what the guidelines recommend for back pain and sciatica.
- Doing only exercises for that muscle. If the glutes remain weak, the problem returns as soon as you resume activity. A more targeted approach can be found in the guide to piriformis stretching for sciatica and the glutes.
- Ignoring the back. Many "piriformis syndromes" that do not get better are poorly labelled lumbar problems: it is worth looking at the lumbar area too.
- Moving on to invasive solutions with a diagnosis that exists only in name. In the review of published cases, 47.6% of patients had no instrumental or intraoperative finding; and in the subgroup where the diagnosis had been made without any instrumental confirmation, the odds of surgical treatment failing were 5.3 times those of people who had such a finding (again published cases, therefore selected). In the same collection the diagnosis had been made on clinical grounds alone in 50.5% of cases, while in 29.7% it had been supported before treatment by an MRI of the pelvis. The authors draw two practical indications from this: before treating, it is best to support the clinical diagnosis with all available investigations, the MRI of the pelvis being the test most used for this purpose, and all non-surgical routes should in any case be tried before operating. To start moving the imaging is not needed; to consider an operation it is.
When an assessment is needed
Beyond the signs listed at the start, a physiotherapy assessment serves to do what exercises taken on their own do not: understand where the pain really comes from, whether the hip, the back or both, and build a load progression suited to you. This is exactly what we do in the first video call, and your schedule remains private.
In summary
Piriformis syndrome is a clinical hypothesis, not a diagnosis that can be certified: it is suspected from deep buttock pain that worsens when seated and with hip rotation, and it is formulated above all by ruling out the lumbar spine. The evidence on treatments is of low quality and does not crown any conservative therapy, but it points to physiotherapy as first line. So: mobility, progressive strengthening of the glutes and an honest review of the habits that keep the problem going, with a deadline in your diary. If after 4 to 6 weeks nothing changes, the right step is not to keep pushing the stretching: it is to review the diagnosis.
You might also be interested in:
Buttock Pain When Sitting: Causes and Remedies Right Buttock Pain: Causes, Diagnosis and Treatment Clamshell: Correct Execution, Mistakes and Variations
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Fonti
- The clinical features of the piriformis syndrome: a systematic review, European Spine Journal, 2010
- Four symptoms define the piriformis syndrome: an updated systematic review of its clinical features, European Journal of Orthopaedic Surgery & Traumatology, 2018
- Piriformis syndrome: a systematic review of case reports, BMC Surgery, 2025
- A systematic review of conservative and surgical treatments for deep gluteal syndrome, Journal of Bodywork and Movement Therapies, 2023
- Deep gluteal syndrome as a cause of posterior hip pain and sciatica-like pain, The Bone & Joint Journal, 2020
- Surgical anatomy of the sciatic nerve: A meta-analysis, Journal of Orthopaedic Research, 2016
- Evaluation of neural therapy effect in patients with piriformis syndrome, Journal of Back and Musculoskeletal Rehabilitation, 2018
Last source check: August 2026.
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