Lip lines are caused by the contraction of the muscles in the face.
The most common cause of lip lines is sun damage, which can occur on any part of your face or body.
Lip lines are also caused by age and genetics. There are treatments for all three causes: sun damage, age and genetics.
Topical cream that contains retinol can help to reduce the appearance of wrinkles and fine lines on your skin. It also helps to make your lips look fuller and more youthful. Injections can also be used as a semi permanent solution.