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.

What if instead of temporarily relieving your allergies with medication, you could train your immune system to stop overreacting to your allergens altogether? That's the idea behind ...

Understanding this often-overlooked symptom could help millions of allergy sufferers recognize when their body is sending important signals about their immune response. When most people think of ...