The authors report a case of median sensory neuropathy after a carpal tunnel steroid injection for the management of carpal tunnel syndrome. Symptoms developed immediately after the injection. Nonoperative management was offered, and the median nerve was serially evaluated by performing ultrasonographic, sonoelastographic, and nerve conduction studies. The patient's symptoms improved with time. We consider that serial ultrasonographic, sonoelastographic, and electrodiagnostic studies are useful diagnostic methods for the evaluation of median nerve injury because ultrasonography and sonoelastography delineate anatomic information and electrodiagnostic studies describe neurophysiologic information.