What is the cause of my tailbone pain?

Coccydynia: A painful tailbone can be caused by direct trauma leading to a fracture or joins sprain. Chronic tailbone pain can be tax with injection or resection but usual get better with rest, sitting on a donut pad, and ice.

See below: The most common causes are trauma, prolonged sitting in a slouched position, hard chairs, and an abnormally positioned "tailbone".