1, headache At night the human body’s activities are reduced, the blood viscosity is higher, more likely to form blood clots, clogging blood vessels. Once the cerebral blood vessels are blocked, there will be a persistent headache, this headache may lead to difficulty in sleeping. 2, numbness of hands and feet Frequent numbness of hands and feet during sleep, especially unilateral, be alert. When the cerebral blood vessels are blocked, insufficient blood supply to the brain, will affect the conceptual cortex spinal cord pathway, at the end of the limbs of the hands and feet performance is more obvious. Patients may also have a sudden inability to hold things, hand-held objects suddenly fall and other symptoms. 3, unilateral drooling Often sleep involuntary drooling, be alert to cerebrovascular blockage. Cerebral ischemia and hypoxia, will make the bilateral cortical brainstem bundles are affected, resulting in sublingual dysfunction, so that the patient appears unilateral drooling, crooked mouth and eyes, corner of the eye is not closed tightly and so on. When arteriosclerosis and cerebral ischemia and hypoxia is severe, patients will also appear frequent yawning phenomenon, to seek medical attention. 4, cold hands and feet hands and feet belong to the end of the limbs, once the cerebral blood vessel blockage, will make the supply of blood to the hands and feet less, the phenomenon of cold hands and feet. This phenomenon in time to cover the quilt at night, do a good job of warm measures, but also difficult to cover the heat, be vigilant.