Open Question: Finger tip pain when used?

A few days before the beginning of my fingertips hurt. Specifically, my left index finger (right hand). It feels like something dead, hurt when I press it or use your fingers. I do not remember ever hurt it. But this day, I think I am playing games or sports. Is this the reason? I will have my nails earlier. If I am too close to the skin? Can be considered a possible cause, and? I am very worried because the ice did not do a lot, and no partial remedy. 19 By the way, I and my hands never had any problems, people with arthritis or any other involved.