The local injection of steroid is performed by the same investigator after the randomization. Using a sterile technique, 20mg depomedrol premixed with lidnocaine is injected using a 25-gauge x 5/8" needle. The needle is inserted medially to the palmaris longus tendon at the distal palmar crease in the wrist at an angle of 45-degree to the forearm. The steroid is injected at approximately 1cm below the skin. The needle will be repositioned if there is any resistance to injection, or any pain or paraesthesia in the median nerve territory.