Yang deficiency constitution is due to the deficiency of Yang Qi and the loss of warmth. It is characterized by deficiency of cold and cold limbs.
For Yang deficiency, "tonifying yang" is the first, and tonifying yang mainly starts with Tonifying the kidney, which should be slow warming, slow tonifying, slow adjustment, and taking into account the spleen and stomach. The so-called "the root of kidney yang, followed by spleen yang" in traditional Chinese medicine, is that the spleen and stomach are healthy, so as to turn Kidney Yang into the foundation of Yang Qi.