There is no definitive cause for coccydynia. However, trauma from falling or being bumped, repetitive action (extensive bike riding or rowing), or childbirth can cause tailbone pain. Aside from an injury, coccydynia can appear to be spontaneous.
Vertebral osteomyelitis is an infection of the bone usually caused by bacteria. In the spine it is commonly found in the vertebrae, although the infection can spread into the epidural and intervertebral disc spaces.
Chiari malformation is a condition that causes brain tissue to settle into the spinal canal. It develops where your skull and neck (cervical spine) come together; when part of the skull is either too small or misshapen, part of the brain can settle into the foramen magnum.
Arachnoiditis is a debilitating condition characterized by severe stinging and burning pain and neurologic problems. It is caused by an inflammation of the arachnoid lining—one of the 3 linings that surround the brain and spinal cord.
Synovial cysts in the spine are benign (not cancer), fluid-filled sacs that develop in the facet joints of the lumbar spine as a result of degeneration. A synovial cyst in the low back is pictured and a spine surgeon explains how a cyst is diagnosed and treated.