How Do you tell if you just broke your finger?!

How Do you tell if you just broke your finger?

I just accidently slammed my pointer finger aganist my door nob. I just put ice on it. As soon as I take the Ice off My hurt finger heats up fast.I can move it, but it feels like there is a wieght on it andit hurts at the bottom of it.I hurts between the pointer/middle join. There is a bump there.

Please help

4 weeks ago
Um now i can't move it into a fist and it starts hurt when I put it striaght up

if u can stilll move your fingure into a arc your figure is prob just brusied and should feel better in week ok so just keep it iced for an hour then keep it off for hour and keep doin that it if still hurts like super bad go to the doctor well hope this helps