what causes cysts on the head
Dermoid/Epidermoid Cysts of the Scalp and Skull. Dermoids and epidermoids are slow-growing benign cysts that typically occur in the scalp and the skull of infants and young children. These result from a part of the scalp, either the epidermis (top layer) or dermis (bottom layer) being misplaced underneath the scalp. This causes the formation of a small cyst filled with normal skin components.