Carpel Tunnel Syndrome causes pain, numbness in the wrist and hand. It occues due to compression of median nerve at the wrist. The pain in this disease is so severe that it can make a person wake up from sleep at night. Some studies have revealed that sleeping position on one side of the body may be taken as one of the associatd factors that lead to the occurence of this disease. Significant ultrasound findings after steroid injection in CTS decreases swelling of median nerve, decreased bowing of the flexor retinaculum and increases mobility of median nerve during finger motion. Ultrasound is a useful method for diagnosis and follow up examination in CTS.