Choose the right height and softness of the pillow, for sleep to maintain the normal physiological curvature of the cervical spine has an important role. Long-term sleep low pillow will lead to cervical spine can not get effective support, cervical spine pressure is too large, easy to appear cervical spine physiological curvature becomes smaller, straighter. Pillow too low will also lead to both sides of the neck muscles continue to be in a state of tension, affecting the local muscle circulation, prone to pillow. In addition, too low a pillow will also have an impact on the blood circulation of the human head and face, too low a pillow leads to reduced blood return to the head and face, the phenomenon of congestion, nasal mucosa congestion will lead to swelling of the nasal mucosa, affecting breathing, leading to the patient to open mouth breathing state, causing dry mouth symptoms. Reduced cerebral blood flow also leads to increased pressure in the blood vessels of the brain, and the patient is prone to dizziness and swelling, which affects the quality of life and sleep of the patient.