BIRTHMARKS (Nevi) Blue-Inexperienced or Blue-Gray Patch;Mongolian Spot The Mongolian spot is a bluish splash like an ink stain with irregular borders that fade gradually into the surrounding pores and skin. The mark was dubbed Mongolian as a result of it was first seen on Oriental babies. Truly, any baby with the tiniest diploma of pigmentation in his ancestry can have Mongolian spots. These birthmarks differ in measurement from a small dot to several centimeters in diameter. They’re usually blue-inexperienced or, much less often, blue-grey, and although they’re most definitely to look on the baby’s buttocks, sometimes we see them on the shoulder, the lower again, over the tail-bone, or, for that matter, nearly anyplace else. For no reason that we know of, they’re extra more likely to appear on the left facet than the tight, and on the back of the arm or leg than the front.