枕头过高，颈部被固定在前屈位，天长日久，患有颈椎病的人会症状加重，引起局部疼痛、肩酸、上肢发麻等。颈部前屈还会压迫颈动脉，妨碍其血液循环。而枕头过低，流入头部的血液偏多，血管充血，颈部肌肉也不能放松，经过一夜时间，晨起会觉得头胀、颈酸、眼皮浮肿。一般情况 Pillow is too high, the neck is fixed in flexion position, over time, people suffering from cervical spondylosis will increase the symptoms, causing local pain, sore shoulders, upper limb numbness. Neck flexion also oppresses the carotid artery, hindering its blood circulation. The pillow is too low, too much blood flow into the head, blood vessels congestion, neck muscles can not relax, after a night of time, morning will feel bloating, neck pain, eyelid edema. generally