Tailbone pain may be related to sedentary, cold and other physiological factors, or it may be caused by chronic strain, trauma, infection, degenerative changes, tumors and other factors, which require timely consultation to identify the cause. 1. Physiological factors: when sitting for a long time or working in a cold environment for a long time, the tissues will be stimulated and the blood circulation will not be smooth, thus causing pain, which can be improved and relieved by resting and getting out of the cold environment. 2. Chronic strain injury: When you are engaged in bending or working for a long period of time, the soft tissues of the tailbone are repeatedly stimulated, causing aseptic inflammation and pain. 3. Trauma: the caudal vertebra is subjected to external force, causing soft tissue injury or fracture, local congestion and edema, causing obvious pain. 4. Infection: the soft tissue of the tailbone is invaded by bacteria and tuberculosis bacillus, resulting in local infection, which will also cause obvious pain, local redness and swelling, and elevated skin temperature. 5. Degenerative changes: lumbar spondylolisthesis or tailbone osteophytes may irritate the surrounding tissues and cause obvious pain. 6. Tumor: when a primary or metastatic bone tumor appears in the tailbone, it will destroy the bone and the surrounding tissues will be compressed, causing pain. If the pain in the tailbone is not improved by keeping warm and resting after physiological factors are excluded, the cause of the pain should be clarified in time, so as to avoid prolonging the condition.