Is it harmful for your body to sleep without a pillow for a long time?
Length width: the pillow should be slightly longer. The length of the pillow should be enough to turn the sleeping position behind. Pillow is not easy to over width, over width is more than the head and neck joints, muscle tension, 15 to 20cm is appropriate.
Height: modern research suggests that the pillow should be slightly below the shoulder to the neck of the same side. The pillow is high according to the physiological curve of human neck 7 cervical alignment and determined, must adapt to the physiological bending to the shoulder and neck muscles in a relaxed state, ligaments and joints, the pillow is too high and too low are harmful. To prevent the blood circulation of the head, causing cerebral ischemia, snoring and stiff neck, and not as people often say "sleep without any anxiety"; low pillow makes the head congests, easy cause eyelid and facial edema, especially when suffering from hypertension, heart disease better choose a pillow.
Soft hardness: pillow with soft hardness, moderate, slightly elastic as well. The pillow is too hard, the relative pressure of head and neck and pillow contact increases, causing head discomfort; the pillow is too soft, it is difficult to maintain the normal height of the head and neck is not necessarily support and fatigue; the elasticity of the pillow is too large, then the head by the external elastic effect, easy to produce muscle fatigue and injury. Therefore, the general pillow core, more rice husk, buckwheat skin, kapok, feather pieces, scattered foam gum, soft and hard, suitable and slightly elastic, for sleep and health benefits.
