Caffeinated beverages taken in an excessive manner causes dark lips. Keeping the lips moist with coconut oil or pure clarified butter is an effective remedy. Topical application of lime juice on the lips helps. Avoid usage of expired and unbranded cosmetics. Avoid makeup at home and clean off your lipstick, when at home. Stains on lips are caused especially by nicotine in cigarettes. Apply a light lip color, followed by a dab with compact powder. Apply the lip color once again and dab it with a tissue. Topical application of honey on the lips helps. Banana and honey made into a paste also lightens skin color. A lip balm with a high sun protection factor (SPF) is an effective remedy, especially before going out in the sun. Adequate intake of water and other fluids also helps. Avoid smoking, as the nicotine in the cigarettes trigger darkening of lips. Almond oil or olive oil is an effective remedy. Glycerin or lime juice is easily accessible home remedies. Avoid sucking your lips and contact your dermatologist
answered by Dr C