(Shih-Feng Lin, Yi-Jen Chen, Hung-Pin Tu , Chia-Ling Lee, Ching-Lin Hsieh , Wen-Lan Wu , Chia-Hsin Chen) – Coccydynia is pain in the coccygeal region, and usually treated conservatively. Extracorporeal shock wave therapy (ESWT) was incorporated as non-invasive treatment of many musculoskeletal conditions. However, the effects of ESWT on coccydynia are less discussed.