The lower lip is the bottom part of the mouth, located beneath the upper lip. It is made up of skin and muscle, allowing it to move and change shape when we speak, eat, or express emotions. The lower lip plays a crucial role in forming sounds and helps in the process of eating by holding food in place. The lower lip is also important for facial aesthetics and expression. It can be affected by various factors, such as injuries, dental work, or skin conditions. Additionally, it is often a focus in beauty and cosmetic procedures, including lip fillers and lipstick application.