You can remove lip lines by exfoliating the area where the lip lines are with an exfoliating cleanser.
Use the exfoliating cleanser when you wash your face and use the exfoliating cleaner over your lip lines.
You can also apply some moisturizer to the lip lines to help keep the lips and the area around your lips from drying out, facial exercises also can help.
You can also buy wrinkle cream that you apply to your lips which will help remove lip lines from around your lips.
If you apply the moisturizer or lip cream on a regular basis you can help make the lip lines go away and keep them away.
Be sure to put some sunscreen around your lips as well to prevent lip lines from appearing.