Swollen upper lips can develop due to allergic reactions, injuries, or medication side effects. However, they can also stem from an infection, Crohn’s disease, and other underlying causes. This ...

Swollen lips may be caused by allergic reactions, injuries, chapping or sunburn, infections, and cysts called mucoceles. The ...

A person may wake up with a swollen lip due to a mild allergic reaction or from an injury. In other cases, it may be a sign of a condition that needs medical treatment. It may be hard for a person to ...