Pink lips are a sign of good health and they make the face look beautiful and charming. Some factors that darken the lips are sun damage, smoking and caffeine consumption. The lips can become dark due to the ageing process. You can remove the darkness of lip through natural ways. Apply honey on lips before sleeping at night and leave it overnight. Honey softens the lips while lightening its color. Rubbing ice on the lips moisturizes and hydrates the lips, making them plump and healthy. Make a paste of milk cream mixed with saffron. Apply on the lips. Some other natural home remedies to lighten the dark lips are as follows.