Swollen lips may be caused by allergic reactions, injuries, chapping or sunburn, infections, and cysts called mucoceles. The swelling comes from either inflammation or built-up fluid under the skin.

Angioedema, a type of swelling that affects the skin and tissues of the body, commonly affects the lips. Angioedema is a type of swelling that affects the deep tissues of the skin and other systems.

Red lips are considered a beauty ideal—but what does it mean when they suddenly appear pale, bluish, or chapped? FITBOOK explains what conclusions can be drawn about health from the color and ...