2 Yin deficiency leads to excessive fire: deficiency leads to excessive yang, deficiency leads to endogenous heat, and yin qi is empty. When sleeping, the defensive qi takes advantage of deficiency and falls into yin, and the surface is unguarded, and the muscle surface is not dense. The fire in the glory is flourishing outside, steaming hot, and sweating when the body fluid is forced to leak. When you wake up, the qi is solid on the exterior, the mysterious house is sealed and the sweat stops the yin. According to the clinical manifestations of night sweats, it can be divided into three types: light, medium and heavy. Chinese medicine believes that the kidney governs five fluids and enters the heart as sweat. Due to atrioventricular discomfort, overwork, blood loss and spermatorrhea, or yin injury due to long-term illness, vegetarian yin deficiency, insufficient renal fluid, endogenous deficiency fire, and forced fluid leakage, hot flashes, night sweats, insomnia, dizziness, tinnitus, red tongue with little coating, and thready pulse. "Medical Sect Must Read" says: "Kidney-yin failure can not retreat from the camp, then internal injuries and night sweats." At this time, the treatment should nourish yin and reduce fire.