Crust is a thick crust formed by the accumulation of sebaceous secretions from the scalp with shed epidermis, hair, and dust, and is actually a form of seborrheic eczema. The cause of scabs is related to the way the mother cares for her baby. If you wash your baby’s hair often before the scabs are formed, you may not have scabs. Because of the infant’s weakness, some mothers are afraid to wash the infant’s hair, and even more afraid to wash the fontanelle, in fact, the fontanelle is not at all untouchable, as long as the action is gentle, the fontanelle can be partially cleaned, so that the frequent washing of the head, will not form a scab.