Reasonable height of folding a pillow

"Rest easy" view is very harmful. Northern University Professor Li Zhiguang, Director, said maintaining the normal physiological state of the cervical spine while sleeping, to make the neck skin, muscles, tendons, ligaments and intervertebral joints and through the neck, trachea, esophagus and nerve tissue, together with the whole body relax and rest. Normal bed high pillow, whether on your back or side, it will cause the cervical physiological changes, some local muscle tension in the neck. Over time, the contracture of neck muscle strain, occurs, small changes in the position of the cervical spine, cervical nerve roots and blood vessels caused by irritation or pressure, reflex spasm occurs, caused by insufficient blood supply to the brain, neck, shoulder, back and arm pain or dizziness, tinnitus, nausea, headache, decreased Visual acuity, hearing loss and other symptoms. High pillow is one of the common causes of stiff neck, cervical spondylosis. In addition, high pillow will widen the perspective of neck and chest, tracheal ventilation is blocked, can cause dry throat, sore throat, and snoring. High pillow also make chest and back muscles tense for a long time, chest compression, preventing normal breathing, longer term will bring adverse effects to the body. Normal pillow sleeping pillow for a long time, it will also change the cervical physiological state. Head veins without valves, gravity slows cerebral venous, arterial blood supply increases, so heads up, irritability, insomnia and other discomfort, low pillow for patients with high blood pressure and atherosclerosis are particularly adversely affected.