Pain down the back of the leg gets called sciatica almost automatically. Sciatica is a description of symptoms, though, not a diagnosis of where they come from, and the distinction changes what actually helps.

One common source is piriformis syndrome, where a muscle deep in the buttock irritates the sciatic nerve. It gets treated as a disc problem often enough that people spend months on the wrong approach.

What Piriformis Syndrome Is

The piriformis muscle runs from the sacrum to the top of the femur, deep beneath the gluteal muscles. It helps rotate the hip outward and stabilises the pelvis when you walk.

The sciatic nerve passes directly beneath it in most people, and in a minority runs through the muscle itself. Piriformis syndrome occurs when that muscle becomes tight, overworked or inflamed and compresses the nerve, producing sciatic nerve entrapment at the buttock rather than at the spine.

Practitioners sometimes distinguish primary piriformis syndrome, related to anatomical variation, from the secondary form, which develops from overuse, injury or prolonged sitting. The second is far more common.

Telling It Apart from Spinal Sciatica

Both produce pain in the buttocks and down the leg, but the patterns differ.

Points toward piriformis involvement:

• Pain centred deep in the buttock, roughly where a back pocket sits

• Worse after sitting for long periods, particularly on hard surfaces

• Aggravated by driving, cycling or climbing stairs

• Eased by walking or standing up and moving

• Tenderness when pressing deep into the buttock

• No back pain, or very little

• Symptoms rarely go past the knee

Points toward a spinal source:

• Low back pain accompanying the leg symptoms

• Worse with coughing, sneezing or straining

• Symptoms following a defined band into the foot or toes

• Numbness or weakness in a specific muscle group

• Worse with bending forward

These are patterns rather than rules, and both can be present at once. A physical examination is what separates them reliably, since specific tests reproduce symptoms in ways that indicate one source over the other.

Common Causes

• Prolonged sitting, especially on a wallet or a hard seat

• Sudden increases in training, particularly running and cycling

• Weak gluteal muscles, which leave the piriformis compensating for work it was not designed to do

• Pelvic asymmetry or altered gait after another injury

• Direct trauma from a fall onto the buttock

That third point is the one most often missed. When the larger glute muscles are underactive, the smaller piriformis takes on stabilising work, stays tight, and eventually irritates the nerve beneath it. Treating the muscle without addressing the weakness behind it produces temporary relief and a recurring problem.

How It Is Diagnosed

There is no single test that confirms piriformis syndrome, which is part of why it goes unrecognised. Diagnosis relies on history, physical examination and ruling out other causes.

An assessment typically includes palpation of the piriformis, orthopaedic tests that stress the muscle and reproduce symptoms, neurological screening to check for signs of a spinal source, and a look at gait and hip mechanics.

Imaging generally cannot show it directly. Scans are used mainly to exclude disc herniation or other structural causes when the picture is unclear.

How Piriformis Syndrome Is Treated

Most cases respond to conservative treatment options, and the useful ones address both the muscle and the reason it became overloaded.

Manual therapy and soft tissue work to reduce tension in the piriformis and surrounding hip rotators.

Joint mobilisation where restriction in the hip, sacroiliac joint or lumbar spine is contributing to the pattern.

Stretching exercises targeting the piriformis and deep hip rotators, done consistently rather than occasionally.

Strengthening of the gluteus medius and maximus. This is the part that prevents recurrence, and the part people skip.

Activity modification, including standing breaks from sitting, saddle or seat adjustments, and sensible training progression.

Medical management, including anti-inflammatories, muscle relaxants or in resistant cases a piriformis muscle injection, may be recommended by a physician. Physical therapy and chiropractic care are both commonly involved, and the approaches overlap considerably.

How to Prevent Piriformis Syndrome Returning

Break up long periods of sitting, keep the glutes strong, warm up before running or cycling rather than starting cold, progress training load gradually, and take the wallet out of your back pocket. That last one sounds trivial and resolves a surprising number of cases.

When to Seek Assessment Promptly

Get evaluated by a healthcare provider if you have progressive weakness in the leg or foot, numbness in the saddle region, any change in bladder or bowel control, symptoms in both legs, or severe pain following a fall or accident. Those signs suggest something other than muscular entrapment.

Frequently Asked Questions

How Long Does It Take to Settle?

Many people improve over several weeks with consistent treatment and exercise. Longstanding cases take longer, and outcomes vary.

Should I Stretch or Strengthen?

Usually both. Stretching alone tends to give short-lived relief if the underlying weakness remains.

Can I Keep Running?

Often yes, at reduced volume, depending on symptoms. Pain that worsens during a run or persists afterwards is a signal to modify.

Is It the Same as Sciatica?

Sciatica describes symptoms along the sciatic nerve. Piriformis syndrome is one possible cause. Disc-related compression at the spine is another.

Does Sitting on a Cushion Help?

Many people find a cushion reduces direct pressure on the buttock, which can ease symptoms while the underlying problem is addressed.

Getting the Right Diagnosis First

Because treatment differs depending on where the nerve is being irritated, identifying the source is what makes the difference. At Heem Health in Tustin, Dr. Joe Park uses movement-based assessment to distinguish between muscular entrapment and a spinal source, including digital motion X-ray where indicated.

You can read about our chiropractic and sports injury care, our supportive therapies, or what the evidence says about chiropractic for sciatica. To book an assessment, contact the clinic.

This article is provided for general educational purposes and is not medical advice. It does not replace assessment by a qualified healthcare provider, and individual results vary. If you have progressive weakness, saddle numbness or changes in bladder or bowel control, seek immediate medical attention.