Piriformis syndrome feels like a deep ache or burning pain in the buttock, often accompanied by shooting pain, tingling, or numbness that travels down the back of the leg. The sensation can range from a dull, constant soreness deep in the glute to sharp, electric jolts that radiate toward the foot. About 5% of all sciatica cases are caused by piriformis syndrome, which makes it relatively uncommon but frequently misdiagnosed.
Where You Feel It
The pain centers in the buttock, hip, or upper leg. Your piriformis is a small, flat muscle that sits deep in the glute, running from the base of the spine to the top of the thighbone. The sciatic nerve, the longest nerve in the body, passes right alongside this muscle (and in some people, directly through it). When the piriformis tightens, spasms, or swells, it compresses the sciatic nerve, and that compression is what creates the distinctive pattern of symptoms.
The pain typically starts deep in one buttock. From there, it can travel along the path of the sciatic nerve: down the back of the thigh, into the calf, and sometimes all the way to the foot. Most people feel it on only one side. The sensation in the buttock itself tends to feel like a deep, persistent ache or a tight knot, while the pain radiating down the leg often feels sharper or more electric.
The Range of Sensations
People describe piriformis syndrome in several distinct ways:
- Aching: A deep, dull soreness in the center of the buttock that doesn’t fully go away with rest.
- Burning: A hot, irritated feeling along the nerve path, particularly in the buttock and back of the thigh.
- Shooting: Sudden, sharp bolts of pain that travel from the glute down the leg, sometimes triggered by a specific movement.
- Tingling or numbness: A pins-and-needles sensation or loss of feeling along the back of the leg, similar to what you feel when your foot “falls asleep.”
These sensations don’t always show up together. Some people primarily experience the deep buttock ache with occasional tingling. Others deal mostly with shooting leg pain. The mix and intensity tend to shift depending on your activity level and position throughout the day.
What Makes It Worse
Sitting is the single most common aggravator. The longer you sit, the more the piriformis compresses against the sciatic nerve, which is why many people notice the pain ramps up during a long car ride, a day at a desk, or time on a hard surface. Standing up after prolonged sitting often produces a sharp flare before the muscle loosens.
Climbing stairs is another reliable trigger. The piriformis activates during hip rotation, and stair climbing demands exactly that motion under load. Walking and running, particularly on uneven surfaces or for extended distances, can also provoke symptoms. Any movement that involves rotating the hip outward (turning your foot and knee away from your body) puts extra demand on the piriformis and can intensify the pain.
Even crossing your legs while seated can set it off. The position forces the piriformis into a shortened, tightened state that presses directly on the nerve.
How It Feels at Night
Piriformis syndrome commonly disrupts sleep. Lying on the affected side puts direct pressure on the irritated muscle, which can wake you up or prevent you from falling asleep in the first place. Sleeping on your back with your legs flat can also keep the piriformis in a position that maintains pressure on the nerve.
Many people find the pain is worst when they first lie down, then eases slightly as they find a tolerable position. Sleeping with a pillow between the knees (on your side) or under the knees (on your back) helps keep the hips in a more neutral alignment. Fully bending the knees while on your side can unevenly distribute weight and make things worse.
How It Differs From Other Sciatica
The tricky thing about piriformis syndrome is that it mimics sciatica caused by a herniated disc in the lower back. Both produce pain, numbness, and tingling down the back of the leg. The key difference is where the nerve compression happens. With a disc problem, the compression occurs at the spine. With piriformis syndrome, it happens in the buttock.
A few patterns can help distinguish it. Piriformis syndrome tends to produce its most intense pain in the buttock itself, rather than in the lower back. Pressing firmly into the center of the glute often reproduces or worsens the pain. Lower back pain is typically minimal or absent. The symptoms also tend to be closely tied to hip position and movement: if rotating your hip inward while the leg is bent reliably triggers your sciatic pain, the piriformis is a likely culprit. During clinical evaluation, a test that places your hip in exactly this position (flexed, turned inward, and slightly rotated) is considered positive when it recreates the familiar sciatic and gluteal pain.
Who Gets It and Why
Piriformis syndrome is more common in people who run or walk frequently, sit for long periods, or have recently increased their activity level. A direct fall onto the buttock can trigger it, as can repetitive motions that involve hip rotation, like lunging or cycling. Women are diagnosed more often than men, possibly due to biomechanical differences in pelvic width and hip angle.
The underlying problem is usually a combination of muscle tightness, spasm, and inflammation. The piriformis can become chronically tight from overuse or underuse (sitting all day shortens it), and once it swells or spasms, it presses on the sciatic nerve. In some people, the sciatic nerve takes an anatomical path directly through the piriformis muscle, which may make them more susceptible.
What Recovery Looks Like
Most people improve with conservative treatment: targeted stretching, activity modification, and sometimes physical therapy focused on hip mobility and glute strengthening. If strenuous exercise like running is contributing, cutting back or temporarily stopping is often part of the initial approach.
Stretching the piriformis specifically (by pulling the knee of the affected side toward the opposite shoulder while lying on your back) is a cornerstone of self-care. Consistent daily stretching over several weeks typically produces noticeable improvement, though the timeline varies depending on how long the condition has been present and what caused it. People who catch it early and address the triggers often see significant relief within a few weeks. Chronic cases that have been building for months may take longer to fully resolve.
The pain pattern during recovery isn’t always linear. Many people notice good days followed by flare-ups, especially when they return to an aggravating activity too quickly. Gradual reintroduction of movement, rather than jumping back to full activity once the pain eases, tends to produce more lasting results.