I would get it checked out ASAP. Before I got this job, I was in a sales office for SBC. There were so many people that had major issues from typing for so many years. In fact, a good friend of mine wound up having to get forced out of her job at only 40 years old because her elbow was giving her so much trouble. She had tendonitis. She then transfered outside to what I'm doing, and cracked her elbow. (Ouch!) Now, she's having a heck of a time finding another job that doesn't use a mouse or keyboard, no repetitive motion, and lifts less then 15 lbs.