Tanning is a very common problem for people living in hot and tropical countries. Its common to see tanning after a good vacation on the side, outdoor sports , long day trekking , outing , etc Tanning is the process of increase in melanin (skin pigmentation) due to sun exposure. Increase of melanin in sun exposed areas causes darkening of the skin Major areas of the body parts exposed to the sun are Face , neck , hand , arms , legs , feet , back.