Babies born earlier than scheduled have softer bones than those who weren’t, so changes in head shape may happen.
Babies with torticollis have an unbalanced neck that may lead babies to sleep on a certain side. Consequently, the back of the head may become flat and asymmetric.
When there are more than one babies in the mother’s womb, the crowded space may lead to changes in head shape.
If babies frequently sleep on a certain side, that side may become flat, the more the babiesdo so.