What causes lips to darken?

What naturally causes lips to darken apart from smoking, coffee, tea and allergies to ridiculous lipsticks?What causes lips to darken?
If your black lips have been caused by drinking too much tea, coffee or by smoking, you will need to cut it down before your lips can lighten. Apply Vaseline to your lips regularly. Ghee is also very good, apply a little ghee every night. This keeps lips moisturised. You could also apply lemon juice to your lips daily, to lighten them slightly. Wear lipstick with sunscreen, as uv radiation may cause pigmentation.What causes lips to darken?
it will due to dryness.





apply betroot juice every day, that help you change your lips colour
- the sun





- hormone levels





- age





- genetics
if you bite you lips and always smoking and using lipstick, your lips will surely be dark....
melanin in ur skin.
Not having proper hydration also causes the lips to darken. Drink 10 glasses of water a day.
wearing too much lipstick I guess
sun, thts y thers sunblock lipstick