The piriformis is a small, flat muscle deep in the buttock that helps rotate the hip outward. In most people, the sciatic nerve passes just beneath it. Piriformis syndrome is the term used when the nerve is thought to be irritated or compressed in this deep buttock area rather than in the spine.4,5 Because it mimics spine-related sciatica so closely, piriformis syndrome is also known as pseudo-sciatica (pseudosciatica), and sometimes as “wallet sciatica.
Commonly reported features:
- deep buttock pain, sometimes spreading to the hip or back of the thigh
- aching, burning, tingling or numbness in the same area
- pain that worsens with prolonged sitting, climbing stairs, walking or running
- tenderness when the deep buttock is pressed
- pain with hip movements that stretch or tense the piriformis
Piriformis syndrome is considered uncommon: estimates suggest it accounts for roughly 0.3% to 6% of low back pain and/or sciatica cases. It is also a debated diagnosis. There’s no single validated test for it, and researchers have questioned whether the piriformis is always the true source when the label is used.
Piriformis Syndrome vs Sciatica: Key Differences
The following comparison table highlights the key differences between sciatica and piriformis syndrome symptoms, causes, diagnosis and first-line treatment. It shows typical patterns; many people don’t fit neatly into one column, and both can be present at the same time.
Pain Location: Spinal Root vs. Deep Buttock Source
As a rough guide, symptoms centered in the deep buttock that flare after sitting a long time are more often linked with piriformis-related irritation. Leg pain that is worse than back pain, reaches below the knee into the foot and flares with coughing or sneezing more often points to a spinal nerve root.1,5
Why Pain Location Alone Can't Confirm the Cause
- It’s the same nerve. Irritation at the spine or in the buttock can send symptoms down the same path.
- Other conditions mimic both. Spinal stenosis, sacroiliac joint problems, hip problems and hamstring injuries can all cause buttock and leg pain.
- Exam findings overlap. A limited straight leg raise, often linked with disk-related sciatica, is also reported in piriformis syndrome.
- There’s no definitive test for piriformis syndrome. It’s usually diagnosed after other causes have been considered and ruled out.
A DPT, a BPT and an MPT each prepare clinicians to assess and treat movement problems. They are not interchangeable for US licensing, though: a state license is what authorizes practice in that state.
What Causes Sciatica and Piriformis Syndrome?
Spinal causes of sciatica
Most sciatica comes from the lower spine. A herniated disk is the most common cause and becomes more likely with age. Spinal stenosis, spondylolisthesis, degenerative disk disease and back injuries are others.1,2 Risk factors include past back injury, extra body weight, low activity, smoking and jobs with prolonged sitting.1 If a disk is the likely source, our guide to herniated disk symptoms and physical therapy explains what recovery usually involves.
Piriformis-related irritation
Possible contributors include spasm, inflammation or scar tissue around the piriformis, a fall onto the buttock, overuse, and long periods of sitting. In some people, the nerve’s path relative to the muscle differs from the usual pattern, though how much this matters is still debated.
Long commutes and hours of desk-bound work, common among tech professionals, don’t cause either condition by themselves. But if your pain changes with them, note it down. It’s one of the most useful clues you can bring to an assessment.
Sciatica vs Piriformis Syndrome: How to Tell the Difference
What your physical therapist or doctor will ask
Expect questions about where the pain is and where it travels, what makes it better or worse, how it started, and whether you have numbness, tingling or weakness. Diagnosis of sciatica starts with this history and a physical exam.
Physical exam tests
Clinicians may watch you walk, test strength and flexibility, and use a straight leg raise to see how stretching the nerve affects your symptoms. If piriformis syndrome is suspected, they may press on the deep buttock and use hip positions that tense the piriformis, such as the FAIR (flexion, adduction, internal rotation), Freiberg, Pace or Beatty maneuvers. These build a picture; none of them confirms the diagnosis by itself.
Do you need an MRI?
Usually not right away. Imaging is generally reserved for severe or worsening symptoms, warning signs, or when the result would change treatment. In suspected piriformis syndrome, ultrasound, MRI, CT and EMG are mainly used to rule out other causes rather than to prove it.
Questions to prepare before your assessment
- Where did the pain start, and where does it travel now? Above or below the knee?
- Is it worse sitting, standing, walking, bending, or when you cough or sneeze?
- Do you have numbness, tingling or weakness? Where exactly?
- Did anything happen before it started: a fall, a new workout, a long flight or drive?
- Have you had back problems before?
- Any change in bladder or bowel control, or numbness around the groin? If yes, go to the emergency section below now.
Treatment for Sciatica vs Piriformis Syndrome
Because the source differs, so does the focus of treatment, though many first steps overlap.
Clinical guidelines also advise against several treatments for low back pain with or without sciatica, including traction, acupuncture, ultrasound therapy, TENS, back braces and foot orthotics. Don’t start any medicine without advice from a doctor or pharmacist. If your symptoms point to a spinal source, learn more in our guide to physical therapy for sciatica relief.
How Physical Therapy Helps, and Its Limits
Physical therapy is a standard part of care for both conditions. A physical therapist can:
- take a structured history and exam to judge whether a spinal or buttock source is more likely
- spot warning signs that need a doctor first
- build an exercise program around what aggravates and eases your symptoms, and progress it as you improve
- advise on sitting, desk setup, driving and returning to activity
Through Resolve360’s online physical therapy sessions, a licensed physical therapist can guide you through specific movement checks on a live video session to help judge whether your pain looks more spine-related or piriformis-related, then adjust your program week by week. Readers in the UK and India will know this as online physiotherapy; the approach is the same.
What physical therapy can’t do: replace emergency care, confirm a diagnosis that needs imaging or nerve testing, or guarantee a recovery time. One stretch won’t diagnose or fix either condition, and a movement that eases piriformis-related pain may aggravate a disk problem. Online sessions also aren’t the right first step if you have any of the warning signs below.
