hello doctor.. I just wanna ask you, my baby is 2 months old, he had a birth mark light greyish and now I found his legs cover with this kind of dot mark continually. at the time of birth he didn't have any mark. last month we got it n it continues cover his below body with greyish dots. its normal or it vanish after some time or we take some action. because I dnt think it's birth mark.