What is lip swelling?
A person with lip swelling has enlargement of the lip, caused by excess fluid in the lip. Common causes of lip swelling include allergies and cold sores.

What are the symptoms of lip swelling?
Additional symptoms that may occur with lip swelling include lip blisters, lip ulcers, and lip redness. Symptoms of serious lip swelling include hives, facial swelling, mouth or tongue swelling, wheezing, breathing difficulty, difficulty swallowing, and fainting.

How does the doctor treat lip swelling?
The treatment for lip swelling depends on the underlying cause. General treatment for lip swelling may include cold compresses, oral antihistamines, and corticosteroids.