Razor bumps can last for 3 or more days. There are precautions that can be taken to prevent them. There also ways to heal them faster.
Razor bumps are caused by irritation from a razor. Using a cream while shaving and allowing the skin to soften will help prevent the bumps. Fresh razors also cause less irritation to the skin. Applying tea tree oil to razor bumps will speed up the healing time. Heat reduces the swelling as well. A warm rag can be placed on the area for 10 minutes to help the skin calm down. In addition, a hydrocortisone cream can help make the bumps clear up.