A 2 year old baby with a white scalp on the head depends on what degree of this white reaches. If it is porcelain white, like walls or porcelain, it could be vitiligo. Although the chances of a 2 year old baby having vitiligo are not high, it is possible. In addition to vitiligo, it could also be pityriasis simplex, also known as pityriasis alba. This possibility is relatively higher because most of the patients of pityriasis alba are infants and children, easily occurring on the head and face, occurring mostly due to poor local blood circulation, or the baby’s gastrointestinal tract dysfunction, as well as sunlight exposure induced.