Medically reviewed by Brendan Camp, MD Key Takeaways Infected lip piercings may show symptoms like swelling, redness, pain, ...

A previously healthy, 14-year-old girl is admitted to the hospital after complaints of painful swelling of her lower lip, with periodic spotty, blood-tinged drainage from several discrete areas with ...

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.