Yang deficiency is different from yin deficiency. Yin deficiency refers to the changes caused by insufficient yin fluid, which cannot be nourished. Yang deficiency is due to the body’s yang energy weakness, the function of the internal organs is reduced, and there is a manifestation of coldness and deficiency, as follows:1. Yin deficiency: some of the manifestations that are usually seen are low-grade fever, heat in the hands and feet, hot flashes in the afternoon, night sweats, heartburn, insomnia, dizziness, tinnitus, a red tongue, little moss, and a thin pulse. In the treatment to nourish the yin, commonly used drugs are salvia, maitake, dendrobium, and Zhi Bai Di Huang Wan, six flavors of dihuang pill, etc. 2, yang deficiency: yang deficiency is prone to the performance of fear of cold, the appearance of lumbar and knee soreness and weakness, can be considered to increase the exposure to sunlight or the use of epimedium, Gui Zhi, cinnamon, epimedium, etc. to regulate the medication.