For razor bump relief now, use tea tree oil, which kills bacteria, and use Kukui oil to soothe. Kukui oil is amazing stuff. Or Sally has a great razor bump relief product out.
Help prevent razor bumps by exfoliating your armpits with a sugar scrub and when you shave, only pull the razor in one direction. Changing directions while shaving and old razor blades give me terrible razor bumps!
To prevent future razor bumps,dont constantly shave and let the hair grow out so some of the bumps can go away on their own. Resist from scratching which irritates and can cause infection to the skin. To treat them you should use aloe or witch hazel to soothe the skin.