Traditional Chinese medicine viewpoint
Traditional Chinese medicine believes that the kidney stores essence, and the true yang in the kidney contains the fire of life, the so-called kidney yang, which is the basis of sexual function and reproductive ability. It can also warm and nourish the internal organs, which is closely related to the growth, development and aging of the human body. Zang-fu organs can only function normally under the warmth of fire. If the kidney yin fails and the yin does not contain yang, there will be symptoms of yang deficiency such as upper heat and lower cold, flushing, dizziness and tinnitus, erosion of the tongue and mouth, and sores.
In fact, "inducing fire to return to yuan" is essentially a method of treating yin deficiency and yang hyperactivity with warm drugs, such as aconite and cinnamon. But I think, even if the method of reducing the fire source is used, in the first case, the drugs of reducing the fire source will be added to the drugs of tonifying kidney yin, and in the second case, needless to say, the method of restoring yang to save the inverse will be widely used.
However, excessive fire due to yin deficiency does not only refer to kidney yin deficiency. Insufficient stomach yin and insufficient lung yin, there is no need to use the method of causing fire to return to the original. It is better to treat it with syndrome differentiation.