Tailbone pain during running typically traces back to irritation of the coccyx or the muscles and ligaments that attach to it, and it tends to respond well to conservative treatment. The coccyx is a small, curved set of fused vertebrae at the very bottom of the spine, and while it might seem vestigial, it serves as an anchor point for several muscles and ligaments in the pelvic floor. About nine out of ten cases of coccyx pain resolve without surgery, but runners face a particular set of triggers that can keep it flaring if left unaddressed.
What the Coccyx Actually Does and Why Runners Feel It
The tailbone is not just a leftover stub. It acts as one leg of a three-point support structure, working alongside the two bony prominences you sit on (the ischial tuberosities) to stabilize you in a seated position.1PubMed Central. Coccydynia: an overview of the anatomy, etiology, and treatment of coccyx pain Multiple pelvic floor muscles, the gluteus maximus, and several ligaments all insert directly onto or near the coccyx. When you run, the repetitive impact and the constant contraction of these surrounding muscles pull and press on the tailbone with each stride. Over hundreds or thousands of strides per session, even minor dysfunction in how force travels through the pelvis can irritate the coccyx or the soft tissue attached to it.
Running is different from walking in a critical way: both feet leave the ground during each stride cycle, so every footstrike involves a true impact rather than a smooth weight transfer. That impact travels upward through the legs, pelvis, and spine. Because the coccyx sits at the very base of the spinal column, it absorbs the tail end of those forces, and if biomechanical alignment is off or supporting muscles are weak, the coccyx and its connective tissue bear more stress than they should.
The Most Common Causes in Runners
Several overlapping factors can produce tailbone pain during or after runs. Understanding which ones apply to you is key to picking the right fix, because a stretching routine designed for tight hip flexors will not help much if the root issue is a stress fracture.
- Overstriding: Landing with your foot well ahead of your center of mass increases both the braking force your body has to absorb and the magnitude of the vertical impact peak. Research has shown that a foot landing farther in front of the hip generates significantly higher backward braking forces, while landing farther ahead of the knee drives up the vertical impact peak.2PubMed. Effects of stride frequency and foot position at landing on braking force, hip torque, impact peak force and the metabolic cost of running in humans Those forces don’t vanish at the ankle; they propagate upward into the pelvis and can stress the sacrococcygeal region.
- Tight piriformis and hip flexors: The piriformis sits deep in the buttock, running from the sacrum to the top of the femur. When it becomes chronically tight, it can pull unevenly on the sacrum and change the mechanical environment around the coccyx. The iliopsoas, the body’s primary hip flexor, has a similar indirect effect; excessive tightness tilts the pelvis forward, altering how the tailbone is loaded during the seated phases of your day and the impact phases of your run.
- Gluteus maximus weakness: The gluteus maximus is the largest and most powerful muscle in the body, and it inserts partly onto the coccyx and sacrotuberous ligament. When it is weak or inhibited, the pelvis loses a major stabilizer. Researchers have noted that the glute max is prone to inhibition and that its dysfunction contributes to chronic pain and injury across the hip and pelvic region.3PubMed Central. Assessing and Treating Gluteus Maximus Weakness – A Clinical Commentary A weak glute max forces surrounding, smaller muscles to compensate, which can increase tension on the coccyx.
- Direct trauma or falls: A hard fall onto the tailbone while running on trails, slipping on ice, or even an old injury from years ago can leave the coccyx bruised, misaligned, or hypermobile. Some runners with post-traumatic tailbone pain don’t connect a prior fall to their current symptoms because the initial injury seemed minor.
- Prolonged sitting between runs: Many runners also work desk jobs. Sitting for long periods loads the coccyx directly, and if you then go out and run, the combination of sustained pressure followed by repetitive impact can aggravate an already-irritated tailbone.
How Running Surface Changes the Load on Your Tailbone
Where you run matters more than most runners assume. A study that placed accelerometers on runners’ sacra (the flat bone just above the coccyx) found that concrete produced the highest mean and peak accelerations compared to synthetic track and grass. On concrete, mean sacral acceleration was about 1.35 g versus roughly 1.30 g on both synthetic track and grass. Peak acceleration was about 3.90 g on concrete versus roughly 3.68 g on synthetic track and 3.76 g on grass.4PubMed Central. An Analysis of Running Impact on Different Surfaces for Injury Prevention Those differences might sound small, but they compound over thousands of footstrikes per run. If your tailbone is already irritated, switching some of your weekly mileage from concrete to softer surfaces can meaningfully reduce the cumulative jarring.
Trail running introduces a different tradeoff. Softer ground absorbs more impact, but uneven terrain increases the risk of slips and falls that can directly traumatize the coccyx. If you are running specifically to manage existing tailbone pain, a flat grass field or a synthetic track is generally a better bet than rugged trails.
When It Might Not Be the Tailbone at All
Pain in the tailbone region during running is not always coccydynia. The sacrum, which sits just above the coccyx, can develop stress fractures in runners. These fractures have historically been called rare, but some research suggests that the incidence in athletes may be as high as 20%. One case report described a male long-distance runner in his late twenties who developed insidious low back and buttock pain after a marathon; imaging eventually revealed a sacral stress fracture that had gone undiagnosed for a month.5BMJ Case Reports. Sacral stress fracture in a young-adult, long-distance runner: an underestimated cause of low back pain The pain from a sacral stress fracture can feel nearly identical to tailbone pain and is easy to miss because standard X-rays often look normal. MRI is usually needed to see the bone marrow swelling that gives it away.
Other conditions that can mimic coccyx pain include piriformis syndrome, referred pain from a herniated lumbar disc, and pelvic floor dysfunction. If your pain doesn’t improve with the conservative measures described below, or if it is getting worse with continued running, imaging and a proper evaluation become important. Treating the wrong diagnosis means prolonging the pain.
Stretches and Soft-Tissue Work That Have Evidence Behind Them
Stretching the piriformis and iliopsoas is one of the most studied conservative approaches to coccyx pain, and the results are encouraging. In a controlled trial, groups that performed piriformis and iliopsoas stretching showed significant improvements in pain pressure threshold and pain-free sitting time, and the improvements persisted even after the treatment period ended. A comparison group that received only conventional care (seat cushioning, sitz baths, and ultrasound therapy) did not improve significantly.6PubMed. Effect of stretching of piriformis and iliopsoas in coccydynia
A separate study added dry needling to the same stretching protocol and found that the combination produced even greater reductions in pain and better functional outcomes than conventional physiotherapy with stretching alone.7INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT. Effectiveness of Piriformis and Iliopsoas Stretching with Dry Needling Among Coccydynia Patients Dry needling involves inserting thin needles into trigger points in the muscle, which can help release deep tension that stretching alone doesn’t always reach. If you have access to a physical therapist who performs it, adding dry needling to a stretching program may speed up recovery.
A basic routine you can start at home involves two stretches held for 30 seconds each, repeated two to three times per side:
- Piriformis stretch: Lie on your back, cross one ankle over the opposite knee, and pull the bottom knee toward your chest until you feel a deep stretch in the buttock of the crossed leg.
- Iliopsoas stretch: Kneel on one knee in a lunge position, tuck your pelvis under slightly, and lean your hips forward until you feel a stretch at the front of the hip on the kneeling side. Avoid arching your lower back.
Consistency matters more than intensity. A few minutes of daily stretching over several weeks tends to produce better results than aggressive, occasional sessions.
Strengthening the Glutes to Take Pressure Off the Coccyx
Because the gluteus maximus both attaches to the coccyx and serves as a primary hip extensor during running, weakness in this muscle creates a double problem: the coccyx loses a stabilizer, and the running stride loses power, forcing smaller muscles to pick up the slack.3PubMed Central. Assessing and Treating Gluteus Maximus Weakness – A Clinical Commentary For runners with tailbone pain, glute strengthening is not optional supplemental work; it addresses one of the most common underlying contributions to the problem.
The glute max is prone to inhibition in people who sit for extended periods, which describes most modern runners. Even if you run five days a week, if you sit eight hours a day, your glute max may not fire efficiently when you need it. Targeted exercises such as hip thrusts, single-leg bridges, and clamshells can reactivate the muscle. A physical therapist or strength coach can also check whether your glutes are actually firing during these movements or whether your hamstrings and lower back are taking over, a common compensation pattern that keeps the cycle going.
Adjusting Your Running Form
Overstriding is one of the most fixable biomechanical contributors to tailbone pain. When your foot lands well in front of your hips, the braking forces increase and the vertical impact spike goes up.2PubMed. Effects of stride frequency and foot position at landing on braking force, hip torque, impact peak force and the metabolic cost of running in humans A simple way to reduce overstriding is to increase your cadence (steps per minute) by about five to ten percent. This naturally shortens your stride and brings your foot landing closer to being underneath your body rather than out ahead of it. Many GPS watches can display real-time cadence if you want a number to aim for.
Another useful cue is to think about “running tall” and maintaining a slight forward lean from the ankles rather than the waist. Leaning from the waist compresses the lower back and pelvis, shifting more load toward the coccyx. Leaning from the ankles keeps the spine neutral and helps the glutes and hamstrings absorb more of the landing force before it reaches the tailbone.
These form changes take time to feel natural. Introduce them gradually over a few weeks rather than overhauling everything on a single run, which can create new problems in other areas.
When Conservative Measures Are Not Enough
Most tailbone pain responds to a combination of stretching, strengthening, form correction, and some patience. Conservative treatment succeeds in roughly 90% of coccydynia cases.1PubMed Central. Coccydynia: an overview of the anatomy, etiology, and treatment of coccyx pain But the remaining cases can be stubborn, and if you have been working on the problem for a couple of months without meaningful improvement, medical interventions exist.
A ganglion impar block is one of the more effective options for persistent coccyx pain. The ganglion impar is a small nerve bundle at the front of the coccyx, and injecting it with a local anesthetic and steroid can provide substantial, lasting relief. Multiple studies have documented significant drops in pain scores that hold for six months or longer. One retrospective study found that pain scores dropped from about 7.8 out of 10 before the procedure to roughly 3.2 at one month, 2.9 at six months, and 3.6 at twelve months, with functional disability scores improving in parallel.8Medicine Science | International Medical Journal. Fluoroscopy-Guided Impar Ganglion Block in Post-Traumatic Coccydynia: A Retrospective Study Impar Block for Post-Traumatic Coccydynia A separate study in patients with chronic coccyx pain confirmed that the procedure produced a drastic, immediate decrease in pain and disability scores that remained significant throughout a six-month follow-up period.9PubMed Central. Ganglion impar block in patients with chronic coccydynia Researchers describe the block as especially effective in patients whose pain has resisted conservative therapy, with high success rates and prolonged effect duration.10PubMed. Pain Relief due to Transsacrococcygeal Ganglion Impar Block in Chronic Coccygodynia: A Pilot Study
Surgery, specifically partial or total removal of the coccyx (coccygectomy), is reserved for the most refractory cases. The reported success rate ranges from about 60 to 90%, and studies have not found a meaningful difference in pain reduction between removing part versus all of the tailbone.11International Journal of Surgery Case Reports. Management of coccydynia in the absence of X-ray evidence: Case report Recovery is slow and can itself limit your ability to sit and run for weeks to months. For runners, this is genuinely a last resort after everything else has failed.
Returning to Running After Tailbone Pain
One of the most frustrating aspects of coccyx pain is that it can linger even after it stops hurting during daily activities, only to flare up again once you resume running. A gradual return is essential. Case reports of athletes returning to activity after chronic coccydynia describe structured timelines. In one documented case, a cyclist with chronic tailbone pain required 22 weeks of chiropractic care before successfully returning to their sport, following an evidence-based protocol that gradually increased load.12PubMed Central. Return to cycling protocol after chronic coccydynia: a case report Running is less directly compressive on the coccyx than cycling, but the impact forces mean you still need a ramp-up period.
A practical approach is to start with short, easy runs on soft surfaces, ideally grass or a track, and monitor how the tailbone feels both during and for 24 hours afterward. If pain stays below a tolerable level and doesn’t worsen run to run, increase duration by about ten percent per week. If pain spikes, drop back to the previous week’s volume and give it more time. Continuing your stretching and strengthening routine during the return period is just as important as it was during the initial treatment phase.
When Sitting Is Part of the Problem
Runners who also sit for long periods are caught in a difficult loop. Extended sitting loads the coccyx directly, and then running adds repetitive impact on top of an already-aggravated area. If you cannot change the total amount of sitting you do, you can change how you do it. A wedge-shaped cushion that takes pressure off the tailbone can help, and standing desks or regular standing breaks throughout the day reduce cumulative coccyx loading. Some runners find that sitting on a doughnut-shaped cushion during acute flares provides enough relief to prevent the pain from compounding before their next run.
There is also a posture component. Slumping in a chair rolls the pelvis backward, pressing the coccyx directly into the seat. Sitting upright, with weight distributed over the ischial tuberosities rather than the tailbone, significantly reduces the pressure on the coccyx. Building enough core and hip-flexor awareness to maintain this position throughout a workday takes practice, but it can make a noticeable difference in how the tailbone feels by the time you lace up your shoes.