Why lips get tanned?   Of all the parts on the face lips are more prone to damage because they are different from the skin on the rest of your face. The lip skin is very thin and soft. It doesn’t have sweat or oil glands unlike skin on other parts. We have to moisturize them from outside. Moreover the sunlight and UV rays also affect the lips badly. Prolonged exposure to sunlight will cause tanning of lips and will form dark spots. Also the lips have no melanin. Melanin cells are natural sun protection pigment cells. This makes it more prone to sun damages. Lips are very delicate. People who do not take care of their lips or have dry lips are more affected by sun exposure especially during summer.   What affects the appearance of lips?   Apart...