A broken tailbone doesn’t produce a dramatic visible injury. From the outside, you’ll typically see bruising, swelling, and sometimes redness centered over the lowest part of your spine, just above the crease of your buttocks. The real “look” of a coccyx fracture shows up on imaging, where X-rays or CT scans can reveal a crack or displacement in the small, curved bones at the very bottom of your spinal column. Most people searching this phrase want to know what to look for on their own body and what doctors see on scans, so let’s cover both.
What It Looks Like on the Outside
The external signs of a broken tailbone are subtle compared to, say, a broken ankle. You can’t see the bone itself since it sits beneath layers of muscle and soft tissue. What you can see is the body’s inflammatory response to the injury: bruising that ranges from deep purple to yellowish-green as it ages, localized swelling directly over the tailbone, and tenderness when the area is touched. The bruising tends to concentrate in the skin between your buttocks and lower back, sometimes extending outward toward the hips.
In some cases, swelling creates a visible bump or puffiness right at the base of the spine. If the fracture resulted from a hard fall (the most common cause), you may also have scrapes or skin irritation in the area. One notable finding that doctors look for during a skin inspection is a small dimple or pit in the skin overlying the tailbone. In one study, 83% of patients with a bony irregularity at the tip of their coccyx had a visible pit in the overlying skin.
Importantly, a broken tailbone and a badly bruised tailbone can look identical from the outside. Bruising and swelling appear with both injuries. You cannot determine whether the bone is actually fractured just by looking at or touching the area, which is why imaging is often needed.
What It Looks Like on X-Ray and CT
On a lateral (side-view) X-ray, a broken tailbone shows up as a visible fracture line cutting across one of the small coccygeal vertebrae. The coccyx is made up of three to five tiny fused or semi-fused bones that curve gently inward toward your pelvis. A fracture may appear as a sharp angle or displacement where the bone segments should flow smoothly into each other. In more severe cases, the lower fragment is visibly shifted forward or backward relative to the upper segment.
Reading coccyx X-rays is trickier than it sounds. There’s enormous natural variation in tailbone anatomy from person to person. Some people have three coccygeal segments, others have five. The natural curvature differs widely, and the degree of fusion between segments varies too. These differences make it genuinely difficult for radiologists to distinguish a fresh fracture from a person’s normal anatomy, especially without a prior X-ray for comparison. Plain X-rays can also reveal bone spurs or dislocations at the joint between the sacrum and the coccyx, which sometimes mimic or accompany fractures.
When X-rays are inconclusive, a CT scan provides a much more detailed look at the bony anatomy. CT imaging can pick up hairline fractures that plain X-rays miss and show the exact position of displaced fragments. Some doctors also use dynamic X-rays, which compare the tailbone’s position while you’re standing versus sitting. Excessive movement (more than 25 degrees of flexion between the two positions) suggests instability, which can indicate a fracture or dislocation even when a static image looks normal.
Fracture vs. Dislocation
A broken tailbone and a dislocated tailbone are different injuries that feel very similar and produce the same external signs. A fracture means one of the coccygeal bones has cracked or snapped. A dislocation (luxation) means two coccygeal segments or the sacrococcygeal joint have separated from each other without the bone itself breaking. On imaging, a dislocation shows a widened gap or misalignment at a joint, while a fracture shows a crack running through the bone.
Both injuries usually follow a direct blow to the tailbone, like falling hard onto a solid surface. However, some dislocations develop gradually through ligament loosening without any single traumatic event. The treatment approach for both is largely the same, focused on pain management and offloading pressure from the area.
What a Broken Tailbone Feels Like
Since the external appearance alone can’t confirm a fracture, knowing the symptom pattern matters. Pain is the dominant feature, and it’s highly specific in its triggers. Sitting is the worst, particularly on hard surfaces. The pain intensifies when you lean back or shift from sitting to standing. Bowel movements often become painful because the muscles surrounding the coccyx contract during that process. Long car rides, cycling, and any activity that puts direct pressure on the base of your spine will flare the pain.
Some people also notice pain during sex, or a deep ache in the lower back that radiates into the buttocks. The area is extremely tender to direct touch, and during a physical exam, pressing on the coccyx from the outside (or assessing mobility internally) will reproduce the sharp pain. Doctors typically check surrounding structures as well to rule out other pain sources, including the sacroiliac joints, nearby bursae, and the lower back muscles.
Recovery and Pain Management
A coccyx fracture typically takes 8 to 12 weeks to heal. During that time, the primary strategy is avoiding activities that load the tailbone. That means limiting how long you sit, avoiding hard chairs, and stepping back from exercise that causes pain.
A specially designed cushion makes a significant difference in daily comfort. Two main types exist. Donut cushions are circular with a hole in the center, allowing the tailbone to float without contacting any surface. Wedge cushions have a triangular cutout at the back edge that keeps pressure off the coccyx while supporting the rest of your pelvis. Both work, and the right choice often comes down to which feels better for your body shape and sitting habits. Many people use one at their desk, in the car, and at the dinner table throughout the healing period.
Over-the-counter anti-inflammatory pain relievers help manage the worst of the discomfort. Ice applied to the area in the first few days after injury reduces swelling. Most coccyx fractures heal on their own without any procedure. In rare cases where pain persists well beyond the normal healing window, further imaging and specialist evaluation can determine whether the fracture hasn’t united properly or whether instability is ongoing.