Tailbone pain (coccydynia) is usually from pressure, strain, or injury to the small bone at the base of your spine, but there are several possible causes and a few red-flag signs you should not ignore.

Common reasons your tailbone hurts

These are some of the most frequent causes people run into in everyday life.

  • Recent fall onto your butt or lower back (e.g., slipping on stairs, ice, sports falls) can bruise, dislocate, or even fracture the tailbone.
  • Sitting too long on hard or narrow surfaces (office chairs, bleachers, bicycle seats, long drives) can irritate the tissues around the coccyx.
  • Poor posture, such as slouching or tucking the pelvis under when sitting, puts extra pressure directly on the tailbone.
  • Repetitive strain from activities like cycling, rowing, or certain gym exercises can inflame ligaments and muscles attached to the coccyx.
  • Pregnancy and childbirth, especially a long or difficult vaginal delivery, can stretch or injure structures around the coccyx.
  • Weight changes: being overweight increases pressure on the coccyx when you sit, while being very underweight reduces the natural fat cushion so the bone takes more direct load.
  • Joint hypermobility or stiffness where the coccyx joins the spine (including conditions like Ehlers–Danlos syndrome) can make that joint move too much or too little and become painful.
  • Pelvic floor muscle tension or spasm can “pull” on structures near the tailbone and be felt as deep aching or pressure there.
  • Nearby issues like hemorrhoids, infections, or rarely tumors pressing on the area can refer pain to the tailbone region.

A simple example: someone who suddenly starts working from home at a hard kitchen chair, sits 8–10 hours a day, and slouches may develop a dull, nagging tailbone ache over weeks without any direct trauma.

When you should seek urgent or prompt medical care

Tailbone pain is often minor, but some patterns need real‑time evaluation.

Go to urgent or emergency care, or call your local emergency number, if:

  • You had a high‑energy injury (car crash, big fall, hard sports impact) and now have severe tailbone or back pain, weakness, numbness, or trouble walking.
  • You have new loss of control of bladder or bowels, or numbness around the anus/genitals (saddle anesthesia).
  • You have fever, feel very unwell, or notice redness, warmth, or swelling near the tailbone (possible infection or abscess).
  • You have a history of cancer and develop unexplained new tailbone pain, especially at night or steadily worsening.

See a doctor soon (non‑emergency) if:

  • Pain has lasted more than a few weeks and is not slowly improving.
  • Sitting, standing, or going to the bathroom is becoming steadily more painful.
  • You have significant weight loss, night sweats, or other unexplained systemic symptoms along with tailbone pain.

Things that often help (but are not a diagnosis)

These are general comfort measures some people use while they’re waiting to be evaluated. This is not a replacement for an exam, especially if you have any red flags above.

  • Use a cushion with a cut‑out or a “donut” pillow to keep direct pressure off the tailbone when sitting.
  • Sit more upright with feet flat on the floor and hips slightly higher than knees; avoid slouching or rolling your pelvis under.
  • Take short standing or walking breaks every 30–45 minutes if you sit a lot.
  • Gentle stretching of hips, lower back, and pelvic area can ease muscle tension for some people.
  • Over‑the‑counter pain relievers like paracetamol/acetaminophen or NSAIDs can help some individuals, but you should only use them if they are safe for you and not contraindicated by other conditions or medicines you take.
  • If symptoms persist, specialized pelvic floor physical therapy is sometimes used in chronic coccydynia to address muscle imbalance and posture.

Quick HTML table overview of causes

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Category Examples Why it hurts the tailbone
Direct injury Fall onto buttocks, sports impact, childbirth trauma Bruising, dislocation, or fracture of coccyx and surrounding tissues
Pressure & posture Long sitting on hard seats, cycling, slouching at a desk Continuous compression and strain of ligaments and joints around coccyx
Body factors Overweight, underweight, joint hypermobility, EDS Too much load or too little cushioning; joint moves abnormally and becomes painful
Pelvic & spinal issues Pelvic floor dysfunction, arthritis, disk changes, scoliosis Altered mechanics and muscle tension referring pain to the tailbone
Other medical causes Infection, hemorrhoids, tumors, cancer spread Inflammation or mass effect on nerves and structures near the coccyx

Bottom line

Tailbone pain has many possible explanations, ranging from simple posture and pressure issues to less common medical causes, and only an in‑person clinician can work out which applies to you by taking a detailed history and doing an exam.

If you tell me a bit more—like how long it has hurt, whether you fell or are pregnant, what makes it worse or better—I can help you think through what to ask your doctor and which possibilities might be more likely in your situation (while still staying on the safe side).

Information gathered from public forums or data available on the internet and portrayed here.