I have razor bumps nd i want to noe how to get rid og them plz help?

ok so heres the thing ive been shaving 4 a while nd i get razor bumps and i jus notciced tht i have scars nd some times i have pimples on top of my .... i havent had but im scared tht wen i do wit my bf its gona looks disgusting.... plz tell me how to get rid of this problem ... nd i also want to ask tht im done with shaving y i wnat to know tht can i start to use nair on it ?? plz let me noe