During extraction of emp (w/personal Medical condition) EE injured his hand. Following the extraction he knew it hurt but was focused elsewhere until it worsened on 3-15-14. Went to Med. Ctr on 3-16-14 & xrays were neg. but hand was immobilized & dr recommended not using it for work 3-17 to 3-21-14. 3-17-14 was when he first reported it to supv & 3-18 was released to full duty.