Shaving

I can’t seem to successfully shave my bikini line without get those red bumps that itch!! I’ve tried so many different things to try and prevent it but it hasn’t seemed to work.... Does anyone know how I can prevent this from happening or have any advice? I’m really self conscious and haven’t been able to go to the beach in any kinda of bikini bottoms without shorts.... sorry for the long texts. thank you 🌻