Cold sweat on forehead is mostly caused by bad pathological reasons, first of all, the most common reason for cold sweat on forehead is caused by cold, cold tends to make the immunity and resistance of human body drop, the body fluid regulation in human body appears abnormal, so that the forehead appears sweaty symptoms. Secondly, cold sweat on the forehead may also be caused by deficiency of qi and blood, people with deficiency of qi and blood often have cold sweat, night sweat, weakness, sleepiness, qi deficiency, pale face, distraction and other undesirable symptoms. Then the forehead cold sweat may also be caused by plant dysfunction, plant dysfunction often causes the human body to appear false sweat, which is mainly due to plant nerve dysfunction, resulting in the regulation of body temperature and body fluids abnormal function, caused by the forehead cold sweat symptoms.