How about sleeping on a pillow at night? I heard that sleeping on a pillow is bad for the spine and easy to walk ...?

Sleeping with a pillow, of course! First of all, there must be its rationality. Secondly, the pillow itself is not harmful to the cervical vertebra, but too high a pillow is easy to make the cervical vertebra fatigue, hyperplasia and/or deformation, thus causing cervical spondylosis! Choosing the right pillow can improve the quality of sleep. If you pay special attention, you can choose a memory pillow that is fun to sleep. Baidu search can see it.