A form of make-up topically applied to the lips to relieve chapped or dry lips. The balm is usually manufactured from beeswax, petroleum jelly, menthol, camphor, vitamins, scented oils, and various other ingredients. Some lip balms can contain octinoxate, avobenzone, or other sunscreens to minimize sun damage.
The primary purpose of lip balm is to provide an occlusive layer on the lip surface to seal moisture in lips and protect them from external exposure. Occlusive materials like waxes and petroleum jelly prevent moisture loss and maintain lip comfort while flavorants, colorants, sunscreens and various medicaments can provide additional, specific benefits.