There are two main causes of sweating at the back of the neck. First, from a Western medical point of view, sweating at the back of the neck has the following four causes: first, common diabetes, diabetic patients are prone to thirst, excessive drinking and urination with excessive sweating, especially sweating at the back of the neck. Second, hyperthyroidism, in the high temperature will appear dripping with sweat, especially the back of the neck sweating significantly. Thirdly, when women have endocrine disorders, they will also have the symptoms of easy sweating on the neck. Fourth, rare diseases such as adrenal pheochromocytoma may also have the symptom of frequent sweating at the back of the neck. The second category, from the point of view of Chinese medicine identification, the most common cause of easy sweating behind the neck is deficiency, often spleen deficiency, kidney deficiency, kidney deficiency with liver fire, will cause easy sweating behind the neck.