Thin or asymmetrical lips refer to lips that are lacking in volume or are not symmetrical in shape. Thin lips typically have less volume and are narrower in appearance, while asymmetrical lips are characterized by an unevenness in shape or size between the upper and lower lip or between the left and right sides of the lips.
Full, well-defined lips are often considered attractive and youthful in many cultures. In contrast, thin lips may be perceived as less desirable in comparison to fuller lips, which can affect self-esteem and cause confidence issues. For these reasons and more, many individuals choose to address their thin/asymmetrical lips by undergoing aesthetic treatments to get the look they want.