Best way to avoid/ get rid of razor bumps??

Hey guys!
I was just wondering if anyone can give me some good advice on how to get rid of (or avoid all )razor bumps.
I've always had problems with them down below, by my bikini area.
It really looks gross to me to have so many scars down there, as well as bumps, and it actually is what held me back from letting my boyfriend eat me out when we first started dating.
He doesn't seem to really mind but it embarrasses me and I'd like for it to be completely smooth down there for once.
I've started using Nair hair removal  down there with a combination of tweasers (to get a few annoying hairs) and razors.