Every time ephedra is first decocted, and must say "to foam", Zhongshi did not say its reasoning, the ancient books do not see the evidence, although it is a small issue, even into the ancient case of doubt. Because it involves logical thinking, slightly analyzed. Examination of the former notes, influential people have two said: one is Tao Hongjing that "foam is annoying". The second is Zhang Xichun pointed out that "foam contains the publication of the fierce force". Tao's statement may be a personal experience, because the ephedra soup evidence is mostly cold evil closed surface, there are different degrees of yang qi stagnation factors, and ephedra and the nature of pungent and warm, sweat to help the heat, in the service of the drug will not sweat sweat, due to the heat of depression disturbed by the heart and mind, there may be a phenomenon of "annoying". However, there are still three problems here: First, that is, the logical thinking problem, with ephedra evidence can be said to be a lot, is not a symptom, does not have the mechanism of yangzhu, it is difficult to annoy, why the treatment of surface treatment of ephedra are "to foam, '? Secondly, whether "annoying" should be blamed on "foam", the evidence is still insufficient. Third, nowadays people decoction of ephedra all soup, are not foam, also did not see every annoying people. It can be seen, Tao's statement is not convincing. Zhang's statement is even more unreasonable. The reason why ephedra is used in ephedra soup is for the cold closed muscle surface of the sun disease mechanism open membrane sweating. In other words, it is the use of ephedra "published by the fierce force". If it is true that "the foam contains the strong force of publication", then it is not appropriate for its treatment? How can it be removed? Or said: go to prevent ephedra published too much, then, the treatment of cold closure and even curbing the heat of Yang Daqinglong Tang, in order to precipitate sweating to open the table, ephedra was used to six two, it can be said that the need for "force", why also "to go on the foam" it? It can be seen that Zhang's statement is also conjecture. Ephedra first decoction to foam problem, should be combined with the "Neijing" historical perspective. Zhongshi "typhoid" "written with nine volumes of Suwen", which indicates that the theory of "typhoid" and "Neijing" has a thousand links, "Suwen - yin and yang should be like the big theory" said: "clear sun hair Tengli, turbid yin to go to the five viscera". Also said: "Yin flavor out of the lower orifices, Yang Qi out of the upper orifices". Zhongshi put this drug odor yin and yang, the theory of clear and turbid lifting and lowering applied to the evidence of the prescription, it is inferred that the first decoction of ephedra to foam, first of all, ephedra in the process of decoction, "foam", and the Zhongshi (or the Zhongshi before the medical practitioner) intuitively think that the foam is turbid, will be hindered by the ascending and descending, and go to get the ephedra of the gas of the light and clear, and is conducive to the The hair is shy and out of the upper orifices. It is as Ke Yunbo said: "The foam is removed, and the meaning of the clear yang hair knee is also taken." It can be said to be right on the mark. In connection with the medicines used in the whole "Treatise on Typhoid", it can also be confirmed that Zhongshi attached great importance to the theory of clearing and lifting of drugs in the "Neijing", not only the problem of "removing foam" of ephedra. In Gui Zhi Jia Ge Gen Tang, Ge Gen Tang and Ge Gen Qin Lian Tang, Ge Gen is emphasized to be decocted and defoamed first, and the reason is the same. Pueraria Mirifica has the function of dissolving surface evils and elevating fluids in these formulas, and the light and clear qi of Pueraria Mirifica is needed for these external dispersing and upward effects, so the heavy and turbid froth that hinders elevation is also removed. Then linking with Da Huang Huang Lian Lian Diarrheal Heart Soup, "impregnated with hemp boiling soup", it can further show that Zhong Shi is very good at using the theory of clearing and elevating the turbidity of the drugs to guide the prescription of medicines. The "diarrhea" in Rhubarb, Yellow Lianthus and Heart Laxative Soup is "qi plumpness", which is caused by the invisible qi heat11 gathering under the heart, and the evil knot should be "diarrhea", while the invisible evil should be "diarrhea". The evil knot should be "diarrhea" and the invisible evil should not be "diarrhea", the evil knot should be treated with rhubarb and yellow rhizome, and the invisible heat should not be used in the path of rhubarb and yellow rhizome. Thus, the Zhongshi living with the odor of thick and thin lift out of people's theories, so as to take this not fried and impregnated with a special approach, on the one hand, take rhubarb and yellow rhizome light and clear gas, the above line of diarrhea and eliminate plaque; on the other hand, can avoid rhubarb and yellow rhizome thick flavor to cold in the injury of the right harm to the evils of the drug can be said to be tricky, and the rhubarb and Ge Ge Ge "to foam" is the same thing. In addition to the "Jin Ui" of thick park ephedra soup square note did not mention the first decoction of foam (I am afraid of omission), the other with ephedra, Pueraria Mirifica, without exception, which is a good indication of the importance of the Zhongshi on this issue. So how should we look at this problem today? First of all, should recognize and clarify the "typhoid" ephedra, Pueraria lobata to foam the objective existence and its meaning. As for ephedra, Pueraria lobata "foam", is it a turbid? Whether it impedes the ascension of Qing? When combined with modern pharmacology to further explore. On the current ephedra, Pueraria lobata medication experience, to foam or not, do not have to be catty, mud ancient not to change.