Torticollis - supine left side flexion stretch ('Torticollis' Cervical side bending AAROM, to left, supine)

Lie your baby on their back.
Make sure their head is straight and they are looking up at the ceiling.
Place your left hand on your baby's right shoulder.
Place your right hand over the top of their head, resting your fingers near their ear.
Gently tip your baby's head to their left using your right hand to make the movement and your left to stabilise the right shoulder.
Hold this position and then return to the midline.