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 ...

Other than mouth trauma, several conditions can cause swollen lips to appear in the morning, including allergic reactions or medical conditions affecting the skin, nerves, or facial muscles. Dental ...

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.