Several factors like the suns UV rays, smoking, caffeine and age can affect our lips and darken them.  Here is a list of natural home remedies that can lighten dark lips.'  Honey: Honey is an amazing natural ingredient, which can be used to treat dark lips. It not only lightens your lips but also makes them soft. Apply honey on your lips and leave it on overnight, everyday. Continue this practice for a couple of weeks and you will notice a change in your lip colour.  Lemon juice: Lemon is known to be a bleaching agent and it acts as an effective remedy to treat dark lips. Apply freshly squeezed lemon juice to your lips and massage them gently. Follow this ritual every night before bed.  Sugar scrub: Sugar works as an excellent scrub to exfoliate lips and also helps get rid of unwanted dead skin. Take three spoons of sugar and mix it with two spoons of butter to make a thick paste. Use this mixture on your lips to exfoliate them. The added butter moisturises your lips. Like your skin, your lips also need to be exfoliated regularly. Try this scrub two or three times a week for lighter lips.  Beetroot: This deep purple ingredient helps cleanse and lighten lips. Beetroot juice has natural agents, which lighten lips. Use its juice on your lips for effective results.  Ice cubes: This simple method of rubbing ice cubes over your lips will help them remain moisturised and fresh as ice cubes not only hydrate your lips but also make them plump.  Milk cream: Try milk cream (malai) with a bit of saffron and apply this mixture to your lips. This is an age old remedy for treating dark lips. Continue this ritual several times a day and at night for effective results.