Razor Bumps

Samoro
I'm the type of person that trims the head of the Bush, and shaves the edges. I don't like to see hair poking out of my underwear there, but ALWAYS end up with razor bumps, and a lot of times they don't go away. It's really starting to take a blow to my confidence, so I was hoping someone could tell me how to get rid of the bumps. Also maybe some ways to prevent new ones from coming since I'm only shaving the edges and not my whole vagina. (I usually shave sideways and outwards. Is this wrong?)