Lemon is often used to treat dark skin patches and spots, and you can use it to naturally lighten dark lips, too. The bleaching property in lemon works well as a simple yet powerful remedy for dark lips.
Squeeze a lemon and apply the juice on your lips before going to bed. Follow this simple remedy daily for one to two months.
Take a thin slice of lemon, sprinkle a bit of sugar on top and rub it on your lips. It will exfoliate dead cells so new, fresh skin can appear. Use this remedy daily for a few weeks.
Alternatively, you can prepare a mixture of one-half teaspoon each of lemon juice, glycerin and honey. Apply it on your lips before going to bed. Do this daily until you see positive results.