If your baby has a ‘flat head’, the first option is to try repositioning. The objective is to continually reposition your baby’s head so he/she does not rest their head on the existing flattened area.
Until four-five months of age, repositioning and tummy time techniques can be enough to encourage natural correction of your baby’s head shape. At night, consider alternating the end of the cot where your baby lays its head. Turn your baby’s head so that it does not lie on the flattened side.