You may also lighten your lips by exfoliating them twice a week with a sugar scrub or a dry, soft-bristled toothbrush. A pomegranate lip scrub prepared from 1 tablespoon of pomegranate seeds combined with little milk is another option, since the fruit may make your lips appear pinker. How to Reduce Lip Size Naturally Consume lots of water. When the body is dehydrated, it hangs onto water, which can create noticeable water retention in certain parts of the body. This might make the lips appear bigger. Lip gloss should be avoided. Lip gloss makes lips look thicker and larger, which might be an issue if they are already plump. Lip lines can be reduced with facial workouts. Apply a moisturizer to dry lips after washing them with water mixed with lemon drops. Tighten the lips, fill one side of the mouth with air, hold it there for 10 seconds, then shift the air to the other side and hold it there for 10 seconds. At least five times more.