Most people have heard of ingrown hairs but not too many actually know what they are and how they can affect your skin. Ingrown hairs are a common phenomenon that occurs when a hair burrows into the skin rather than growing outside of it. Sometimes, this will happen after hair has been removed from shaving, tweezing, or other hair removal procedures. You can identify an ingrown hair by its appearance and symptoms. They will look like small, solid bumps or small puss-filled blisters. Anyone can be affected by ingrown hairs but they most commonly develop in people with thick, curly hair. Most cases of ingrown hairs are mild but occasionally can lead to scarring if they are not cared for properly.