The cool feeling at the back of the neck is generally associated with muscle tension at the back of the cervical spine. When the muscle tension will appear local vasoconstriction, local arterial vasoconstriction will cause the posterior circulation to weaken, and the posterior circulation will be weakened to cause the cool feeling or feel colder. And at this time there will also be fear of wind and cold, can not blow air conditioning, blowing fan. You need to go to the hospital to have a cervical spine X-ray to determine if the physiological curvature of the cervical spine has become straight. The straightening of the physiological curvature of the spine is often related to the nature of work, such as prolonged head down or prolonged reading of cell phones, desk work, when the cervical curvature will appear straightened, the rear muscle tension. Treatment: 1, you can choose the method of hot compress or moxibustion, hot compress and moxibustion in the rear muscles of the cervical spine, through the heat can accelerate blood circulation, improve local circulation and metabolism, so that the feeling of chill is reduced. 2, need to be in long-term ambulation, such as about 1 hour to do the cervical back extension action, can correct the cervical physiological curvature. 3, choose the right cervical spine health pillow when sleeping, the right cervical The health pillow must be concave, that is, low in the middle, high on both sides of the shape, whether in supine, or sitting side sleep can play a corrective effect of the curvature, when the cervical curvature is corrected after the feeling of cold will naturally disappear.