1. apply almond or butter in the night and wash it in the morning...u can use it everyday. This can make your lips smooth and increase the liveliness in the lips.
2. Apply some drops of pomegranate juice. This can make your lips fresh.
3. Apply some beetroot pieces on lips.
4. You can make a mixture of lemon juice, milk, almond oil and sugar. Scrub this mixture gently on your lips daily. Since lemon juice is a natural bleaching agent, it will help you lighten the color of your lips. Milk and almond oil on the other hand will remove the uppermost layer of dead cells and also provide nourishment to your lips.
5. Massage your lips everyday, this will increase the circulation of blood to your lips and eventually, reduce the darkening of your lips.
6. Use your lips kiss everyday.
7. Mildly bit your lips. This also helps in blood circulation.
8. Have healthy diet. Take more fruits and vegetables. This will avoid further pigmentation of your lips.