Hello, today I woke up with a small hole in my hand that I had not noticed the day before. It is about the size of the tip of a marker. I do feel pain on it whenever I stretch the skin on my hand, and whenever I run dripping water over it. I would like to find out what this is. Thank you.

Pictures of it:

http://img405.imageshack.us/img405/8518/photoon20101208at06073.jpg

http://img140.imageshack.us/img140/2817/photoon20101208at06072.jpg

http://img686.imageshack.us/img686/325/photoon20101208at0607.jpg
A bite? From what?