Which Allergy Causes Swollen Lips?

Anaphylaxis is a severe allergic reaction that can cause swollen lips.

What allergies cause swollen lips?

Food allergies are a common cause of swollen lips. According to the American College of Allergy, Asthma, and Immunology (ACAAI), about 4 percent of adults and up to 6 percent of children have food allergies. The swelling usually starts as soon as you eat something you're allergic to.

What foods can cause swollen lips?

Food like cow's milk, eggs, peanuts, tree nuts, fish, and shellfish are notorious for causing allergic angioedema. Also, some people with hay fever may experience swollen lips.