The lower lip is the bottom part of the mouth, located beneath the upper lip. It is made up of skin, muscle, and connective tissue, allowing it to move and change shape during activities like speaking, eating, and facial expressions. The lower lip plays a crucial role in forming sounds and helps in the articulation of speech. In addition to its functional importance, the lower lip is also a key feature in facial aesthetics. It can vary in size and shape among individuals, contributing to a person's overall appearance. The lower lip is often highlighted in beauty and cosmetic discussions, including topics related to lip care and lip fillers.