Is It Sciatica or Piriformis Syndrome? How to Tell the Difference

Sciatica describes the pain, not the cause. It means the sciatic nerve is irritated somewhere along its path. The most familiar cause is a disc or narrowing in the spine, but the nerve can also be squeezed in the buttock by a tight piriformis muscle. That is piriformis syndrome, and it is treated differently, so it is worth knowing which one you have.

Sciatica is a symptom, not a diagnosis

The sciatic nerve is the largest nerve in the body. It runs from the low back, through the buttock and down the back of the leg. When it is irritated anywhere along that path, you can feel shooting or electric pain, burning, pins and needles, or numbness in the leg or foot.

The most familiar cause is a herniated disc or narrowing in the spine pressing on a nerve root. But the nerve can also be compressed lower down, where it passes the piriformis and the other deep hip rotators. Trigger points in the gluteus medius and minimus can also send pain down the leg that mimics sciatica.

What piriformis syndrome is

The piriformis is a small, deep muscle that runs from the sacrum to the top of the thigh bone. The sciatic nerve runs right beside it. When the muscle becomes tight, develops trigger points or thickens, it can irritate the nerve. That is piriformis syndrome.

It is often missed because sciatic pain is assumed to come from the spine. When imaging is normal, or does not match the symptoms, the buttock muscles are the next place to look.

Clues that point to the spine

These are clues, not a diagnosis, and many people have more than one source.

• Pain that gets worse when you bend forward, cough or sneeze.
• Numbness, pins and needles or weakness that reaches the lower leg or foot.
• Imaging that shows a disc or narrowing at the level that matches your symptoms.

Clues that point to the piriformis

• A deep ache in one buttock.
• Pain that builds when you sit, especially on a hard surface.
• Pain with hip rotation, stairs or running.
• Stretching helps for a while, then the pain comes back.
• Spine imaging that was normal or does not explain the pain.

How the exam tells them apart

The first visit runs 60 to 75 minutes. I check strength, reflexes and sensation to see how the nerve is affected. Then I test whether the sciatic nerve is irritated in the buttock or at the spine, and I examine the piriformis, gluteals and the other deep hip rotators by hand. When pressing on a muscle brings on your familiar pain, that is a strong clue.

Most people have more than one driver in play. A disc may be part of it, with a tight piriformis adding pressure lower down. Finding which one leads makes treatment more efficient. I am glad to work alongside your physician, orthopedist or physical therapist.

How each one is treated

When the piriformis is the main driver, dry needling reaches it and the other deep rotators directly. These muscles sit under the gluteals, where stretching and massage have a hard time reaching them. Alongside dry needling, I use neuro-functional acupuncture, built on neuroscience and evidence-based practice. Unlike regular electroacupuncture, the needles and gentle electrical stimulation are mapped to the specific nerves involved, such as the sciatic nerve. It works in three ways. It neurorehabilitates, helping irritated tissues and nerve receptors recover. It neuromodulates, shifting the body's own pain-relieving chemistry. It neuroregulates, calming the nerve signals and circuits that keep buttock and leg pain going. You also get sitting and activity guidance and gluteal strengthening, coordinated with your physical therapist. The piriformis syndrome page covers this in more detail.

When the spine is involved, the same tools still treat the muscle and nerve parts of the pain, alongside your physician's care. Neuro-functional acupuncture along the lumbar and sciatic nerves calms nerve irritation, and releasing the muscles that tighten around an irritated nerve takes pressure off it.

Most patients are seen weekly or every other week during active care. Results vary from person to person.