A tiny, unwelcome crater of pain, a red circle of fire tucked against your cheek. It feels worse with every prodding poke. Another canker sore. What did you do to deserve this? Maybe nothing at all.

Dark circles are not just a way of your body telling ... low iron levels—when your body is not able to produce a substance in red blood cells that lets them carry oxygen—cause anemia which ...

Roll your tongue around your mouth, and you might feel a sting from a new tender spot. A tiny, unwelcome crater of pain, a red circle of fire tucked against your cheek. It feels worse with every ...