If your Pediatrician approves this, you can try wedging them to the other side with a rolled-up towel.  However do check this out with your health care professional first.

An approved head support, such as the Baby-Head-Rest (TM) can prevent and treat Flat Head Syndrome, by helping a newborn’s skull gently reshape itself over time.  Baby-Head-Rest is for babies under 4 months, and if used when baby is lying down, can help the soft skull to round out into its natural shape.  You can find out more or purchase a Baby-Head-Rest here .