同学们也许有过这样的体验:如果睡觉不用枕头,或者在睡眠的过程中头离开了枕头,醒来之后会感觉头昏脑涨,眼皮也沉重浮肿,好像没有睡醒—样;另外仰卧醒来也常会有头颈酸胀的感觉。这究竟是什么原因呢? 原来,人在睡觉的时候,如果不 Students may have experienced this: If you sleep without a pillow, or in the process of sleep head left the pillow, wake up will feel dizzy, eyelids also heavy edema, as if not waking up - like; the other lying awake There are often feeling head and neck soreness. What is the reason? It turns out that when people are asleep, if not