Razor Bumps??

Anon • xx
I have really sensitive skin and I get razor bumps a lot. I have two questions. 
1) I just got this really really bad razor bump. It's like huge and looks like a pimple. It's in so much pain. Is it definitely a razor bump or could it be something else?
2) How can I get rid of razor bumps like permanently and prevent them?
Pls help I'm in so much pain ):