Medically reviewed by Maria M. LoTempio, MD Swollen lips may be caused by allergic reactions, injuries, chapping or sunburn, ...

Swelling causes a pimple to develop ... A pimple on your lip forms when a pore gets clogged with bacteria. A lip pimple is a small, tender, raised bump on your skin. A pustule is a pimple filled ...

Cold sores and pimples on the lips can look and feel similar, but they're different. Derms break down the differences and ...