The skin in this area is very delicate. There are some hair remover creams made for this area that are supposed to be easy on your skin. Whatever you use, rub in some cream after your'e done.
I myself shave my bikini line and there are times when I get irritation. What I try to do is always use a new blade and shaving cream for sensitive skin. After shaving I apply a unscented cream. There are other options such as waxing and getting the hair lasered.