The Coccyx is triangular arrangements of bone situated at the base of the spine below the sacrum. Since it represents vestigial (no longer necessary or lost some function during the course of evolution) tail, therefore it is also known as the Tailbone. The axial skeleton is made up of the bones of the head, neck, and trunk. The spine forms an axis that supports the other parts of the body. 


The skull is at the top of the spine. The spine consists of separate bones called vertebrae with fibrous discs between them. The ribs are attached to the thoracic vertebrae. There are normally 12 ribs on each side of the body which protect the heart, lungs and act as a bellows box for the breathing process. The five lumbar vertebrae lie in the lower part of the back. Below the last lumbar vertebra is the sacrum, followed by the Coccyx. In children, four separate bones make up the Coccyx. The three lowest bones often fuse during adulthood to form a beak-like bone. The point where the sacrum and coccyx meet remains fibrous throughout life.


The human foot has 26 bones, which are as follows:

  1. The seven tarsals or ankle bones.
  2. The five metatarsals, or instep bones.
  3. The fourteen phalanges or toe bones.
Where is the Coccyx?

Coccyx Anatomy

Depending upon people’s age, the Coccyx may comprise three to five bones joined by fused and semi-fused joints. It was initially believed that the Coccyx is one bone structure, now it is proven wrong as there is some limited movement between the bones allowed by joints and tendons.

The Coccyx and sacrum are connected through the sacrococcygeal joint, and the limited movement includes slightly forward or backward as the pelvis, hips, and legs move. At the point when we sit or stand, the pelvis bone (including Tailbone) turns outward and inwards to more readily support and balance the body.

What is the function of Coccyx?

In spite of the fact that the Coccyx is viewed as vestigial in the human body, it has some use in the pelvis. For example, the Coccyx is one piece of three-section support necessary for an individual in the sitting position. In order to keep the balance, stability, and maintain sitting position, Tailbone helps in bearing the weight of the body distributed between the base of the two hip bones (or ischium) and the Coccyx.

The Tailbone is also the connecting point for some pelvic muscles. These muscles support anus, vagina in females, and assist in defecation, and help in running, and moving the legs.


For what reason tailbone injury or tailbone pain happens more in women than men.

Coccydynia or injuries in the Tailbone is commonly more typical in ladies. A few reputed sources in medical science found that women are five times more susceptible to coccydynia than men.

Most of the coccyx injuries happen to ladies on the grounds that:

  • A broad pelvic structure, which decreases pelvic movement and leaves the Coccyx open to injury
  • Women in general spot more weight on the Coccyx while sitting, which can lead to injury
  • Labor, which may cause harm as the child moves over the Tailbone
  • Pelvic muscle issues can likewise increase coccyx pain. During the medical examination, it is noted that women have coccyx pain during the premenstrual period.


Tailbone pain is followed by other, more specific symptoms that can sometimes indicate how pain is occurring. It may be further characterized by one or more symptoms-

  • Localized pain and tenderness
  • Pain that is worse when moving, sitting, and standing
  • Increased pain with sitting
  • Pain that may increase with sexual intercourse and bowel movement