First of all, lying on the arm to sleep, many nerves will be oppressed, nap often heart anxiety, sleep not practical.
Second, sleep on the eyeball will be oppressed, after a nap will usually appear temporarily blurred vision. If this happens for a long time, it will cause high intraocular pressure and impaired eyesight, which will increase the eyeball swelling, increase the ocular axis, form a high myopia, and also make the incidence of glaucoma easy.
In addition, lying down to sleep, long-term pressure on the arm and face, will affect the normal blood circulation and nerve conduction, so that the two arms, facial numbness and even feel sore, if not attention, time will become a local nerve paralysis or make the face of deformation.
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