Shaving bumps or razor bumps are those pimple-like bumps you get after shaving. Most of the time, they are caused by improper shaving technique. In some cases, shaving bumps can happen when you fail to prep your skin properly. After you shave and your hair grows back, they can curl on themselves and start digging their way back into your skin. This irritates the skin, triggering an inflammatory response and small, red bumps appear. Now, the problem with shaving bumps doesn’t end with those bumps.