Is your deep buttock pain the hamstring tendon or the piriformis?
Both cause deep buttock pain that is worse with sitting, which is exactly why they get mixed up. Proximal hamstring tendinopathy is a load problem in the tendon where the hamstrings attach to the sitting bone, so the pain is pinpoint and local. Piriformis syndrome is a deep gluteal nerve problem, where the piriformis and nearby muscles irritate the sciatic nerve, so the pain tends to sit higher in the buttock and often travels down the leg. One is a tendon under too much load; the other is a nerve under too much pressure.
Written by Kareem Hassanein, Registered Physiotherapist. Burlington, Ontario. This is a guide, not a diagnosis. A brief in-person exam sorts these out reliably.
Proximal Hamstring Tendinopathy
Pain at the sitting bone where the hamstring tendons attach, often worse with sitting, hills and running
Piriformis Syndrome
Deep buttock pain from the sciatic nerve as it passes through the buttock (piriformis or deep gluteal syndrome)
Side by side
The patterns that separate hamstring tendinopathy from piriformis syndrome in clinic. Read across each row and compare.
| Aspect | Hamstring tendinopathy | Piriformis syndrome |
|---|---|---|
| Where it hurts | Pinpoint, right on the sitting bone (the ischial tuberosity) low in the crease of the buttock. You can usually put one finger on it. | Deeper and higher in the middle of the buttock, over the piriformis. Harder to localise with one finger, often described as a deep cramp. |
| Does it travel down the leg | Usually stays local to the sitting bone, though it can ache down the back of the thigh. It rarely behaves like a nerve. | Often radiates down the back of the leg with a nerve quality, sometimes with tingling or numbness, because the sciatic nerve is involved. |
| Sitting | Worse the longer you sit, especially on hard surfaces, because sitting compresses the tendon directly against the sitting bone. Perching on the edge of the seat helps. | Also worse with prolonged sitting, but driven by pressure on the deep gluteal muscles and nerve. Crossing the legs or a wallet in the back pocket can be a clear trigger. |
| What makes it flare | Running, especially uphill or at speed, lunging, deep squatting, and stretching the hamstring by reaching for the toes. | Positions that load the piriformis: prolonged sitting, climbing stairs or hills, and getting in and out of a car. A straight hamstring stretch is less specifically provocative. |
| Stretching it | Deep hamstring stretches, such as reaching for the toes, often aggravate it, because they squeeze and pull on an already irritable tendon at the sitting bone. | Some people find a gentle hip stretch, knee drawn toward the opposite shoulder, eases it briefly; for others, stretches that tension the nerve make the leg symptoms worse. |
| Nerve symptoms | Numbness, pins and needles, and true nerve pain are not typical. If they appear, the sciatic nerve next to the tendon may be secondarily irritated. | Nerve-type symptoms are part of the picture: a sciatica-like ache, tingling, or a sense of the leg being heavy or asleep. |
| Typical story | A runner who added hills or speed, or someone whose job or commute turned sitting-heavy, with pain creeping in at the sitting bone. | Insidious deep buttock pain, often after long periods of sitting, sometimes after a fall onto the buttock, with leg symptoms that come and go. |
Where it hurts
Hamstring tendinopathy
Pinpoint, right on the sitting bone (the ischial tuberosity) low in the crease of the buttock. You can usually put one finger on it.
Piriformis syndrome
Deeper and higher in the middle of the buttock, over the piriformis. Harder to localise with one finger, often described as a deep cramp.
Does it travel down the leg
Hamstring tendinopathy
Usually stays local to the sitting bone, though it can ache down the back of the thigh. It rarely behaves like a nerve.
Piriformis syndrome
Often radiates down the back of the leg with a nerve quality, sometimes with tingling or numbness, because the sciatic nerve is involved.
Sitting
Hamstring tendinopathy
Worse the longer you sit, especially on hard surfaces, because sitting compresses the tendon directly against the sitting bone. Perching on the edge of the seat helps.
Piriformis syndrome
Also worse with prolonged sitting, but driven by pressure on the deep gluteal muscles and nerve. Crossing the legs or a wallet in the back pocket can be a clear trigger.
What makes it flare
Hamstring tendinopathy
Running, especially uphill or at speed, lunging, deep squatting, and stretching the hamstring by reaching for the toes.
Piriformis syndrome
Positions that load the piriformis: prolonged sitting, climbing stairs or hills, and getting in and out of a car. A straight hamstring stretch is less specifically provocative.
Stretching it
Hamstring tendinopathy
Deep hamstring stretches, such as reaching for the toes, often aggravate it, because they squeeze and pull on an already irritable tendon at the sitting bone.
Piriformis syndrome
Some people find a gentle hip stretch, knee drawn toward the opposite shoulder, eases it briefly; for others, stretches that tension the nerve make the leg symptoms worse.
Nerve symptoms
Hamstring tendinopathy
Numbness, pins and needles, and true nerve pain are not typical. If they appear, the sciatic nerve next to the tendon may be secondarily irritated.
Piriformis syndrome
Nerve-type symptoms are part of the picture: a sciatica-like ache, tingling, or a sense of the leg being heavy or asleep.
Typical story
Hamstring tendinopathy
A runner who added hills or speed, or someone whose job or commute turned sitting-heavy, with pain creeping in at the sitting bone.
Piriformis syndrome
Insidious deep buttock pain, often after long periods of sitting, sometimes after a fall onto the buttock, with leg symptoms that come and go.
What I check in person to separate them
These are the clinical tests I actually run in the first visit. You cannot do them all on yourself reliably, but understanding what they look for helps explain why an in-person exam sorts these so quickly.
Pointing to the pain
A single finger landing right on the sitting bone points to the hamstring tendon. A flatter hand over the middle of the buttock points more to the deep gluteal muscles.
Bent-knee stretch and Puranen-Orava tests
Loaded hamstring-lengthening tests that reproduce pain at the sitting bone support proximal hamstring tendinopathy.
Hamstring load tests, such as a long-lever or single-leg bridge
Pain at the sitting bone when the hamstring has to produce force points to the tendon, since tendinopathy is load-related.
FAIR position and seated piriformis tests
Taking the hip into flexion, adduction, and internal rotation tensions the piriformis and can reproduce deep buttock and leg symptoms in piriformis syndrome.
Neural tests, including straight leg raise and slump
I use these to judge how much the sciatic nerve is involved. A clearly neural response shifts the picture toward a deep gluteal or nerve-driven problem rather than a pure tendon.
Which pattern fits you better?
Plain-language routing. This is not a diagnosis, and real patients often sit between the two, but the language below is a reasonable starting point.
Hamstring tendinopathy
Your pattern more likely fits proximal hamstring tendinopathy if the pain is pinpoint on the sitting bone, sitting on a hard chair is the worst part of your day, running or lunging provokes it, stretching the hamstring makes it worse rather than better, and there are no real nerve symptoms. It often starts after a jump in running volume, hills, or speed, or a new sitting-heavy routine.
Read the hamstring tendinopathy pagePiriformis syndrome
Your pattern more likely fits piriformis syndrome if the pain sits deeper and higher in the buttock, travels down the leg with a nerve quality, is hard to put a finger on, and comes with tingling or a heavy, asleep feeling. Prolonged sitting, crossing the legs, or driving tend to set it off, and a gentle piriformis stretch may give brief relief.
Read the piriformis syndrome pageIf you still cannot tell
These genuinely overlap, and it is common to be unsure, because both hurt with sitting and both sit in the deep buttock. A short in-person assessment can narrow the possibilities, and some cases need reassessment as they respond. I localise the tender point, load the hamstring to see if the tendon is the driver, put the hip through the positions that tension the piriformis, and run neural tests to judge how much the sciatic nerve is involved. I also clear the lower back first, since a disc or nerve root can mimic both. Stretching the wrong structure, particularly repeated hard hamstring stretches when the tendon is the problem, can keep it going.
When both are going on
These can coexist, and they share a neighbourhood: the sciatic nerve runs right beside both the hamstring origin and the piriformis. A tendon problem at the sitting bone can secondarily irritate the nerve, and a sensitive nerve can make the whole area guard. The umbrella term deep gluteal syndrome is sometimes used precisely because these structures sit so close together and can be hard to separate. That is why I treat the dominant driver first rather than chasing every tender spot.
When to see a doctor first
- A sudden pop or tearing feeling at the sitting bone during a sprint, slip, or forced split, often with bruising down the back of the thigh. Possible proximal hamstring avulsion. Get an urgent surgical opinion within days, through your family doctor, a sports medicine physician or emergency. Not every avulsion needs surgery, but if repair is chosen it is easier when done early.
- New trouble starting to pass urine or feeling it pass, new loss of bladder or bowel control, new numbness between the legs or around the back passage, new loss of genital sensation or sexual function, or severe or rapidly worsening weakness in both legs. Go to emergency now. These can be signs of cauda equina syndrome.
- A new foot drop (the foot catches or slaps when you walk), or weakness in one leg that is getting worse. Same-day medical assessment.
- Fever, unexplained weight loss, a history of cancer, or constant pain at night that does not ease with rest. See your family doctor before starting physiotherapy.
Questions patients ask about telling these apart
Both hurt when I sit. How is that supposed to help me tell them apart?
Sitting is the overlap, so I look at what else is going on. Tendon pain is pinpoint on the sitting bone and gets worse with running and hamstring stretching. Piriformis pain sits higher and deeper, is harder to localise, and tends to send symptoms down the leg. If sitting plus a nerve quality down the leg is the story, it leans piriformis. If sitting plus pinpoint sitting-bone pain that hates running and stretching is the story, it leans tendon.
I have tingling down my leg. Does that rule out the hamstring tendon?
Not entirely, but it shifts the odds. A true tendon problem is usually local and does not produce nerve symptoms on its own. When tingling or numbness is present, the sciatic nerve is involved, which points toward piriformis syndrome or the broader deep gluteal picture, or toward a source in the lower back. That is worth assessing properly rather than guessing.
Should I stretch it?
Avoid stretches that bring on your familiar sitting-bone pain or increase pain or tingling down the leg. Deep hamstring stretches often aggravate an irritable hamstring tendon. With a deep gluteal problem, some people find a gentle hip stretch eases it, while for others stretching irritates the nerve. Exercise choice and range depend on the assessment and how you respond, not just on the label, so it is worth knowing what you are dealing with before you build a routine around stretching.
Could it be my back instead?
Yes, and that is the first thing I rule out. A lower lumbar disc or an irritated nerve root can refer pain into the buttock and down the leg and mimic both of these. The clues are whether bending, coughing, or sneezing change your symptoms and whether the pain follows a clear nerve path. Clearing the back first stops a lot of buttock pain being treated in the wrong place.
Can I have both at once?
You can. The hamstring origin and the piriformis sit close together with the sciatic nerve running between them, so an irritable tendon and a guarded, sensitive deep gluteal region can travel together. When that happens, I work out which one is driving most of your symptoms and treat that first, then address the other as it settles.
How long does each take to settle?
Both ask for patience. Proximal hamstring tendinopathy often improves over a few months rather than weeks, with gradual loading and changes to sitting. Piriformis and deep gluteal symptoms can settle sooner once the aggravating positions and nerve sensitivity are managed, but they can come back if the load and habits that set them off do not change. Rest alone is often not enough for either.
Evidence this page draws on
Sources I lean on when separating these two conditions in clinic.
Proximal hamstring tendinopathy typically presents as deep buttock pain where the hamstrings attach to the sitting bone, is load-related, and is commonly managed with education and progressive tendon loading rather than rest. Research has not established a single best program.
Goom TS, Malliaras P, Reiman MP, Purdam CR. "Proximal Hamstring Tendinopathy: Clinical Aspects of Assessment and Management." J Orthop Sports Phys Ther 2016; 46(6): 483-493.
In a randomised trial of 100 people with proximal hamstring tendinopathy, six sessions of individualised physiotherapy and six sessions of shockwave therapy, both with standardised education, gave similar results on the main outcomes up to 52 weeks.
Rich A, Ford J, Cook J, Hahne A. "Physiotherapy Compared With Shockwave Therapy for the Treatment of Proximal Hamstring Tendinopathy: A Randomized Controlled Trial." Am J Sports Med 2025; 53(14): 3396-3407.
Piriformis syndrome is characterised by a cluster of features: buttock pain, pain aggravated by sitting, tenderness near the greater sciatic notch, and pain on maneuvers that increase piriformis tension. A straight leg raise does not rule it out.
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.
Deep gluteal syndrome is an umbrella for non-discogenic posterior hip pain from sciatic nerve entrapment and explicitly includes both piriformis syndrome and a proximal hamstring source, which is one reason these are frequently confused. Excluding spinal causes and imaging the pelvis aid diagnosis.
Park JW, Lee YK, Lee YJ, et al. "Deep gluteal syndrome as a cause of posterior hip pain and sciatica-like pain." Bone Joint J 2020; 102-B(5): 556-567.
Treatments that commonly sit inside either plan
The specific mix depends on the assessment and your goals. These are the pieces I draw from most often for both conditions.
Exercise Therapy
Personalized exercise programs designed to restore strength, flexibility, and function.
Soft Tissue & Myofascial Therapy
Targeted hands-on techniques to ease muscle tension, tenderness, and stiffness.
Dry Needling
Thin needles placed in tight, tender bands of muscle. It can help ease pain and muscle tension in the short term.
Sports Rehabilitation & Return to Sport
Staged rehabilitation to help you get back to your sport after injury.
Book an assessment
If this page has helped you narrow things down, or if it has left you wanting a proper exam, I see patients at Endorphins Health & Wellness Centre in Burlington. Direct insurance billing is available, and a physician referral is not required.
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Burlington, ON L7M 0W9
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