Clinical Insight · Fascia & Pain
Glute Pain Isn’t Always the Piriformis
Deep buttock pain gets labeled “piriformis syndrome” more often than the evidence justifies. The deep gluteal region is a crowded space where several muscles and the body’s largest nerve cross paths — so the piriformis takes the blame for problems that often start somewhere else. When we map these patients with ultrasound at The Fascia Institute, the piriformis is frequently healthy. The real pain generator is usually elsewhere — and finding it is the whole point.
Jacques Courseault, MD, CAQSM, FAAPMR · The Fascia Institute and Treatment Center®
01 · The Anatomy
A crowded space where pain hides
Glute pain is a common complaint, and it’s frequently blamed on the piriformis. But the true cause is often more complex, because the gluteal region packs multiple muscles and nerves into a small space. Understanding what’s actually there is the first step to finding the real source.
Two muscle groups drive hip function here. The gluteal muscles — gluteus maximus, medius, and minimus — handle hip extension and stability. The deep external rotators — the piriformis, superior and inferior gemellus, obturator internus and externus, and quadratus femoris — rotate the hip outward.
The gluteus maximus is the largest and most superficial of these. It originates at the ilium and sacrum and attaches to the iliotibial tract and the back of the femur, powering external hip rotation while working with the iliopsoas and piriformis to keep the pelvis and trunk stable — especially when you stand on one leg (Elzanie & Borger, StatPearls). Because these surface muscles sit directly over the deeper rotators and the sciatic nerve, a problem in one layer is easily mistaken for a problem in another.
02 · The Sciatic Nerve
The body’s largest nerve runs right through it
The sciatic nerve is the largest nerve in the body. It forms from the spinal nerves L4 through S3 and travels from the lower back, through the pelvis, and down the leg, controlling movement and sensation across much of the thigh, leg, and foot (Cocco et al., 2023). Its course takes it directly past the piriformis and the other deep rotators.
That anatomical intimacy is exactly why the sciatic nerve — and the piriformis next to it — so often get blamed for lower-body symptoms. But proximity is not the same as cause. The nerve can be irritated at many points along its path, by many structures, and by the fascia surrounding all of them.
03 · Piriformis Syndrome
Real, but overdiagnosed
Clinicians use the term piriformis syndrome when the piriformis muscle is thought to press on the sciatic nerve. That pressure can produce deep buttock pain, tingling or numbness down the leg, and pain that worsens with sitting.
Classic symptoms attributed to it
- · Deep buttock pain
- · Tingling or numbness radiating down the leg
- · Pain that worsens the longer you sit
The problem is that the diagnosis is slippery. There are no agreed-upon, confirmatory diagnostic criteria, and the symptoms overlap heavily with other conditions such as lumbar disc disease and sciatica from other sources (Lo & Robinson, 2024; Probst, 2019). Without a specific test to confirm it, many people are labeled with piriformis syndrome on symptoms alone — which makes an accurate diagnosis, and effective treatment, harder to reach.
04 · The Bigger Picture
Beyond the piriformis: deep gluteal syndrome
Sports-medicine and imaging literature has moved past the idea that the piriformis is the usual culprit. The modern umbrella term is deep gluteal syndrome (DGS) — non-discogenic sciatic nerve entrapment in the subgluteal space — and piriformis syndrome is now considered just one subtype of it (Kizaki et al., “Deep gluteal syndrome: an overlooked cause of sciatica”).
Many structures besides the piriformis can entrap or irritate the sciatic nerve in this space: the gemelli-obturator complex, the quadratus femoris and ischiofemoral region, the hamstring origin, fibrous bands, and the gluteal muscles and their fascia. A recent narrative review specifically looks beyond nerve entrapment to the muscle–tendon and fascial pathologies that drive posterior hip pain. In other words, “piriformis syndrome” has become a catch-all label for a whole neighborhood of problems — which is exactly why guessing at it rarely works.
05 · What We Find at FIT
What Fascial Mapping actually shows
Yes, true piriformis-related nerve irritation happens — when the muscle is tight, inflamed, or genuinely compressing the sciatic nerve. But at The Fascia Institute we don’t assume it. We look. Using our in-house diagnostic method, Fascial Mapping™, we image the fascial network with ultrasound and grade tissue health before treating anything.
In a recent internal review of 10 patients diagnosed elsewhere with piriformis syndrome, the piriformis averaged a fascial-health grade of 3.6 out of 4 (where 1 is the most damaged and 4 is healthiest). In most of these patients, the piriformis simply wasn’t the problem.
So where was the pain coming from? In many cases, the larger, more superficial muscles — the gluteus maximus and gluteus medius — carried hidden fascial restrictions that irritate nerves and create tightness. This fits the broader evidence: pain of predominantly gluteus medius origin is a well-documented, and under-recognized, source of low-back and leg pain (Kameda & Tanimae, 115-case series). We’ve documented this pattern in our own case report of a golfer whose “sciatica” resolved with a single gluteal hydrodissection — despite an MRI that pointed elsewhere.
06 · How We Treat It
Find the true source, then treat it precisely
Once mapping shows where the problem actually lives, treatment can be targeted. When the sciatic nerve is genuinely entrapped or the piriformis is truly involved, ultrasound-guided nerve hydrodissection can free the nerve from the surrounding fascia — an approach shown to improve outcomes in deep gluteal syndrome and to relieve piriformis-related sciatic pain. Shockwave therapy is another effective option; a 2025 randomized trial found it comparable to ultrasound-guided injection for piriformis-related pain (Fu et al., 2025).
More often, when the real driver is a fascial restriction in the surface gluteal muscles, we treat it with our Hydrofascia Release™ protocol — releasing the restricted tissue that was irritating the nerve in the first place. The through-line is simple: if you’re living with persistent glute pain, piriformis syndrome may be part of the story, but it is rarely the whole story. Our job is to find the true source with Fascial Mapping™ and treat it with precision, rather than chase a label.
References
Elzanie A, Borger J. Anatomy, bony pelvis and lower limb: gluteus maximus muscle. StatPearls. — NCBI Bookshelf
Cocco G, et al. Ultrasound imaging of the sciatic nerve. Ultraschall Med. 2023;44(5):e263–e273. — DOI
Lo JK, Robinson LR. Piriformis syndrome. Handb Clin Neurol. 2024;201:203–226. — DOI
Probst D, et al. Piriformis syndrome: a narrative review of the anatomy, diagnosis, and treatment. PM&R. 2019. — PubMed
Kizaki K, et al. Deep gluteal syndrome: an overlooked cause of sciatica. Knee Surg Sports Traumatol Arthrosc. 2020. — PMC
Beyond nerve entrapment: a narrative review of muscle–tendon pathologies in deep gluteal syndrome. Diagnostics. 2025;15(19):2531. — MDPI
Kameda M, Tanimae H. Effectiveness of active soft tissue release and trigger point block for low-back and leg pain of predominantly gluteus medius origin: a report of 115 cases. J Phys Ther Sci. — PMC
Ultrasound-guided sciatic nerve hydrodissection improves clinical outcomes in deep gluteal syndrome: a case-series study. Diagnostics. 2024;14(7):757. — DOI
Burke CJ, et al. Targeted ultrasound-guided perineural hydrodissection of the sciatic nerve for the treatment of piriformis syndrome. — PubMed
Fu YS, et al. Ultrasound-guided piriformis muscle corticosteroid injection vs. shockwave therapy: a randomized controlled trial. J Formos Med Assoc. 2025. — DOI
This article is provided for education and reflects the cited literature; it is not medical advice and does not create a physician–patient relationship. Diagnosis and treatment decisions are individualized during clinical evaluation. The Fascia Institute and Treatment Center® · 2520 Harvard Ave, Ste 2B, Metairie, LA 70001 · (504) 704-1254.
