A wound caused by an insect bite, Mosquito bite, cut, burn, or other injury heals,but it always leaves a mark on my skin which doesn't get fade even by time. Also I have been facing few more issues like dark armpits, darken inner thighs ,which was not too much earlier. I dnt use any cosmetics, just a Jonson baby powder n lotion. No makeup products apart from lipstick n eyeliner. Can anyone suggest me remedies or any medicine to get rid of this problems.