The causes of night sweating (abnormal sweating after going to sleep and stopping sweating after waking up) mainly include too much thinking, yin deficiency and fire exuberance (deficiency of yin essence in the body and hyperactivity of deficiency fire), and evil heat and steam. 1. Too much thinking: too much thinking will damage the heart and spleen, resulting in blood deficiency, causing blood deficiency (heart blood shortage), because sweat is the liquid of the heart, blood does not nourish the heart, sweat leakage is too much, thus causing spontaneous sweating (involuntary sweating during the day, sweating aggravated by a little movement), night sweating and other conditions. 2. Excessive yin deficiency and fire: Excessive labor, loss of blood and essence, or depletion of yin by evil heat, resulting in deficiency of yin and essence, and internal growth of fire, so that sweat can not be hidden internally and externally, and then night sweating will occur. 3. Evil heat and depression: due to emotional upset, liver qi stagnation (liver qi and blood transportation is not smooth, emotional depression) or addiction to spicy and thick flavors, the body warmth and heat in the prevalence of internal heat fumigation of fluids and leakage, thus leading to excessive sweating. Patients with night sweating are advised to go to a regular hospital for treatment under the guidance of a professional physician.