hello doctor my has blue color mark on his hand from birth...he is 3months now...is this mark go away?... anything to worry?

A. If it has been from the time of birth itself it could probably be a birthmark but you should get a check with your doctor as this way you’ll come to know because this kind of a mark is usually seemed like a Mongolian spot or sometimes when a child gets hurt and Mongolian spots are almost on all the body and they subside by the age of 1 1/2 to 2 years but you need to be sure about it whether there is a Mongolian spot or something else