Typically sleeping with 2 or more pillows is not normal. Doing this, when you are on you back will flex your head forward, flattening your neck curve. On the side it will laterally bend your head into an awkward position. Doing this on a regular basis, is not good for your spine as it will start to take on this shape.
Additional Reading Resources:
- Which pillow is best for helping me to fall asleep?
- What to do for a stiff neck when you sleep with too many pillows at night
- The importance of a neck roll for good sleeping posture
- Hot and Cold Packs for Neck Pain Relief
- I think i Strained my Neck
