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Tailbone

The tailbone, also referred to as the coccyx, is the very bottom part of the spine and is composed of several small fused vertebrae. It has an important role in providing attachment for muscles and ligaments and helps maintain balance when sitting.

MRI Hip joint and pelvis
Magnetic resonance imaging

MRI Hip joint and pelvis

5 795 kr

Health checks for increased well-being

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Contents

Quick version

What is the tailbone?

The tailbone is the name for the small bony structure located at the very bottom of the spine and is usually made up of 3–5 small vertebrae that are often fused together. The tailbone serves as an attachment point for muscles, ligaments, and tendons and contributes to pelvic stability. Despite its small size, injuries or strain on the tailbone can cause significant pain and discomfort.

Anatomy and function

The tailbone is a remnant of the tailbone from our ancestors, located just below the sacrum. Its main function is to provide attachment for the pelvic floor muscles, tendons, and ligaments, which support posture and stability. The tailbone also plays an important role as a support point when sitting.

Injuries and strain

Tailbone injuries often occur from falling backward, childbirth, or sitting for long periods on hard surfaces. Overuse can also cause inflammation or irritation.

Common conditions and disorders

Pain in the tailbone, also called coccydynia, is a frequent issue. The condition may be caused by fracture, dislocation, inflammation, or chronic irritation. The pain often worsens while sitting and may radiate toward the pelvic floor.

Examination and diagnosis

The diagnosis is made through clinical examination and sometimes imaging such as X-ray or MRI of hip and pelvis. The doctor makes an overall assessment based on mobility, tenderness, medical history, and any associated injuries.

Relevant symptoms

  • Pain when sitting
  • Tenderness when pressing on the tailbone
  • Difficulty rising from a seated position
  • Pain during bowel movements or intercourse
  • Pain radiating toward the pelvic floor

Related conditions and diagnoses

  • Coccydynia
  • Fracture of the tailbone
  • Dislocation of the tailbone
  • Chronic pelvic pain
  • Pelvic floor muscle and ligament involvement

Questions and answers

Pain when sitting is often caused by pressure on the tailbone. This may result from injury, inflammation, or prolonged pressure on the bone. A soft seat cushion can help reduce the discomfort.

Most coccyx pain is harmless and caused by overuse, pressure, or minor injuries. However, the pain can be very bothersome and interfere with daily activities such as sitting, standing up, or walking. In rare cases, severe or persistent pain may be due to more serious causes, such as an infection in the area or a tumor in nearby tissue. Therefore, it is important to seek medical care if the pain does not improve, worsens, or if additional symptoms appear, such as fever, weight loss, or a general feeling of illness.

Yes, the tailbone can sustain fractures from falls or trauma. This often causes intense pain that worsens when sitting or moving. In most cases, tailbone fractures are treated conservatively, meaning without surgery. The most common treatment method is rest and pressure relief, for example using a seat cushion to reduce pressure on the tailbone. Pain-relieving medications and physiotherapy may also be recommended.

Treatment often consists of rest and pressure relief, for example using a seat cushion, pain-relieving medications, and physiotherapy. In severe cases, injections or surgery may be considered, but this is uncommon.

The healing time varies but can range from a few weeks to several months, depending on the severity of the injury.

Yes, during pregnancy and childbirth the tailbone is exposed to extra strain, which can cause pain and tenderness.

Coccydynia is the medical term for long-lasting pain in the tailbone. It may be caused by trauma, inflammation, or overstrain.

Tests related to Tailbone

Skeleton and Joints

MRI Hip joint and pelvis
Magnetic resonance imaging

MRI Hip joint and pelvis

Doctors comment
  • Recommended for hip pain, stiffness or lameness
  • Painless MRI examination with a high level of detail
  • MRI Hip/Pelvis – referral and appointment booked directly

5 795 kr