Pretty sure lot of women have this problem anyone know the solution? Every time I shave my vagina red bumps always pop up, what prevents them from popping up? Any suggestions?

The razor is irritating the hair follicles.

Some things you can do include always using a new, sharp razor; use shaving cream so the razor doesn't drag on your skin, and shave in the direction of hair growth instead of against it. There are after-shave creams for preventing razor bumps, too. I don't know how good they are.

Other options would be either waxing or using a chemical hair remover like Nair or for a permanent solution, get laser hair removal done by someone reputable.