The skin on lips is unlike any other part of your body. It's so thin that you can see the blood vessels that make your lips appear reddish. And because there aren't any oil glands in the lips, your lips dehydrate faster than any other skin on your body. Your lips become thinner as you age, and dehydration accelerates this process. Here are a few easy steps you can follow for a plump up lips.
Hydrate: Try to avoid licking your lips which will dry out your lips even faster. Instead, use a hydrating chapstick. Matt lipsticks dehydrate your lips so perhaps opt for some shine instead. If you must go matte during the day, pamper your lips at night with Vaseline.
Exfoliate: Scrub off the dead skin to promote skin turnover. Usually, once a week is more than enough. A simple DIY option is mixing honey and sugar, rub them onto lips, leave for 10 minutes. In this 10 minutes, honey will lock in the moisture. When time is up, use an old, clean toothbrush to rub off in circular motions.
Consider SPF products: The sun destroys your lips and will cause premature aging of the lips. I recommend using an SPF 15 chapstick as your first layer, then go with your lip color routine.