Even though we’ll be nestling under fuzzy warm layers soon, our arms aren’t going to be in complete hibernation! And that means those pesky red razor burn bumps are going to have to come out of hiding eventually. Limit yourself to four swipes. “Try to get the job done in four passes or less,” Marmur said. Over-shaving an area will just tear at the skin and cause further damage, allowing irritation, bumps and razor burn to occur. Good to keep in mind for shaving any area of your body!