How do you shave it!?

Abby
Hi! I like having a clean shaved smooth vagina, it's honestly amazing.. BUT when ever I shave I get red bump and sometimes can never get it all, I think it's razor burn but I've tried useing a brand new razor, load it up with shaving cream and nothing works and it's also itchy when growing back which I know is normal but is there any methods of stopping it?