If sitting for more than a few minutes makes your tailbone throb — driving hurts, work chairs are torture, and getting up from the couch feels sharp — you're dealing with coccydynia. Most people are told to buy a donut cushion and wait. That rarely works, because in the vast majority of cases the tailbone itself isn't the problem. The muscles attaching to it are.
The 6 real causes of tailbone pain when sitting
- Tight pelvic floor muscles pulling the coccyx forward (by far the most common — and the one most providers miss).
- A fall onto the tailbone months or even years ago that never fully healed.
- Childbirth — prolonged pushing, a large baby, or forceps/vacuum delivery can bruise or shift the coccyx.
- Prolonged sitting on hard surfaces (bike seats, bleachers, long car rides) irritating the ligaments.
- Constipation and hard stools straining the coccyx from the inside.
- Rapid weight loss removing the natural fat pad that used to cushion the bone.
How to sit without making it worse (today)
- Skip the round donut cushion. It leaves the coccyx unsupported and often makes pain worse. Use a wedge cushion with a coccyx cutout instead.
- Lean slightly forward with weight on your thighs — not rocked back onto your sacrum.
- In the car, tilt the seat base so knees drop just below hip level, and use a lumbar roll behind your low back.
- Break up sitting every 20–30 minutes with a 60-second stand or walk.
- Avoid slouching into a soft couch — it's the worst position for the coccyx.
The 3 moves that start to unlock it
- Child's pose with knees wide — 90 seconds, slow belly breaths dropping into the low back.
- Happy baby, gently rocking side to side — this decompresses the coccyx.
- Deep squat hold (heels down, holding a doorframe if needed) — 60 seconds, breathing into the pelvic floor.
Why donut cushions often make it worse
The classic ring cushion suspends the tailbone in mid-air. That sounds like a good thing, but it lets the coccyx drop into extension and stretches already-irritated ligaments. A wedge with a rear cutout supports the sit bones and unloads the tailbone at the same time — much better for coccydynia.
When to see a pelvic floor therapist
If your tailbone pain has lasted more than 4 weeks, if it hurts to go from sitting to standing, if bowel movements are painful, or if you're avoiding sitting altogether — you need an internal pelvic floor assessment. External stretches only reach half the story. The muscles pulling on your coccyx attach from the inside; releasing them is exactly what pelvic floor therapy is for.
Red flags — call your doctor
- Numbness or tingling down the legs.
- Loss of bowel or bladder control.
- Fever, redness, or drainage near the tailbone.
- Pain that gets sharper week by week instead of easing.
Pelvic floor & postpartum OT in Basking Ridge, NJ
Modern Movement is a women's health and orthopedic occupational therapy practice based in Basking Ridge, New Jersey, serving moms across Somerset County — including Bernardsville, Bedminster, Far Hills, Warren, Bridgewater, Martinsville, Gladstone, and the surrounding Somerset Hills. We work with pregnant and postpartum women on pelvic floor health, diastasis recti, core recovery, low back & hip pain, and return-to-running — in person, one-on-one, for a full hour.
Want a plan built around you?
Book a 1:1 session with Amanda in Basking Ridge for a personalized assessment.