Epidural steroid injection is a treatment for low back pain which allows smaller doses with less risk of side effects and longer duration of relief than systemic administration. From 1 June 1992 to 31 January, 1994, 1 mg/kg of triamcinolone diacetate in 8 ml of lidocaine 1% was administered 56 times to 33 patients who complained of low back pain. Results of epidural steroid injection provided effectiveness in treating various low back pain diseases except postlaminectomy syndrome. However there are no gains about repeated epidural steroid injection.