Finding an ingrown hair a few days after shaving , waxing or epilating is frustrating. It’s caused by hair curling into and getting trapped underneath the skin, and it can be itchy and painful. Thankfully, ingrown hairs, also commonly called razor bumps, are treatable at home, similar to razor burn . But don’t expect them to go away overnight. Being patient while using ingrown hair treatments is key to preventing infection and scarring later on. I talked to four dermatologists to learn more