Weird, itchy bump on wrist?

I've had this weird ring shaped bump on my wrist for a couple of weeks now. And I just noticed that it is bigger than it was last week. It's a bump, but its kind of flat, just the ring around it is raised. It's kind pink around the outside, and on the inside it is brownish. Also, its kind of itchy... By the way, I have Indian skin tone, but I don't know if that matters :P

Also, about maybe, 3 weeks ago, I was scratched by a kitten while volunteering, and I know that some of the kittens were sick and previously had ringworm.....

Sorry the pictures are such horrible quality. makes it look more raised than it actually is.

http://s1110.photobucket.com/albums/h456/Justme169...