Less common white bump causes worth noting are: Flat warts: “These small, skin-colored bumps are caused by specific strains of the human papillomavirus (HPV),” says Dr. McTighe. “While less common on ...

For example, some people develop it inside their mouth. For many of these people ... The following describes the signs and symptoms for each area. You may see red (A), purple (B), gray (C), or brown ...