Cold and flu means feeling offended by external evils. The feeling of external evils is often manifested as superficial symptoms, therefore, a doctor should be able to treat superficial symptoms and be good at treating superficial symptoms. Zhongjing’s “Treatise on Typhoid Fever” warns us everywhere that the first thing to do is to relieve the surface, or to relieve both the surface and the inside of the body, which is the principle of treating surface symptoms. The articles that emphasize the first relief of the surface include: Article 46: “If the symptoms are not resolved in eight or nine days, the surface evidence is still there, and this should be sweated”; Article 56: “If the urine is clear, I know that it is not in the interior, but is still in the surface, and it is necessary to sweat”; Article 152: “If the sun is in the midst of a stroke, and the symptoms are resolved with a lowering of the profits and vomiting, it is better to treat the surface symptoms with good treatment. Article 152: “In the case of sun stroke, if the patient is vomiting, and the surface is dissolved, then the patient can be attacked”; Article 164: “Plankton cannot be attacked; the surface should be dissolved first, and the surface can be attacked when it is dissolved”; Article 170: “If the pulse of typhoid fever is floating, and there is fever without sweating, the surface is not dissolved, so it is not allowed to be treated with Baihu Tang”, and so on. And the surface and the inside of the double solution is specifically embodied in the hemp apricot and glycyrrhizic stone soup, Yue maidservant soup, big Qinglong soup, small Qinglong soup and so on. There are different kinds of evils, such as wind, cold, summer, dampness, dryness and fire, which are externally affected by the six elements, and there are evils such as internal wind, internal cold, internal dampness, internal dryness and internal heat (fire), etc. However, the majority of people who enter by external sensation are those who enter by external sensation. However, the majority of those who enter by external sensation, or direct attack of evil qi, or internal injury based on external sensation. Evil external sensation has from the surface into the inside, from shallow to deep development process, such as “Han Fei Zi? Metaphor for the old” in the magpie to see the Duke of Cai Huan said: “the gentleman has a disease in the coupling, not treated will be afraid of deep.” If the surface evidence is not healed, the disease into the evil change, or surface evidence of improper treatment will become “bad disease”. Therefore, for the treatment of surface evidence, clinical need to pay great attention. First of all, it is important to get rid of the evil out of the house, which is why Zhongjing repeatedly cautioned in the “Treatise on Typhoid Fever” that the first thing to do is to relieve the surface of the surface. A few days ago, I treated a young man with a cold for 3 days and a fever for 1 day. At the beginning of nasal congestion and runny nose, after taking pCms cold medicine, there is sweating, but the nasal congestion and runny nose is not relieved, and then appeared to have a fever, vomiting and spitting thick phlegm. Although the diagnosis and treatment of medicine and sweating, but nasal congestion, runny nose is still in the surface of the evidence is not resolved, it is still given to the small blue dragon soup plus reduction, the specific prescription for the ephedra 10 grams, almonds 10 grams, Gui Zhi 10 grams, 20 grams of Qing half-summers, 20 grams of Chen Pi, 15 grams of Cangzhu, Poria 15 grams, 15 grams of Job’s tear grains, 15 grams of septoria herb and three slices of ginger. The instructions to sip porridge, warm cover, a dose of the whole body sweating and symptoms greatly reduced, the heat subsided, and then adjusted and healed. This case gives us hints, there are four: First, the treatment of exogenous diseases, we must follow the first table to solve the principle of treatment, or table and double solution. If the surface of the evidence is not removed and the treatment of the inside, then the evidence of a hundred changes. Zhongjing in the “typhoid theory” repeatedly warned, such as “so into the knot chest, the following too early, so also” and so on. Secondly, sweat cinnamon sticks without sweat ephedra, but not absolutely. Clinical judgment of the presence or absence of superficial evidence, the existence of Gui Zhi Tang evidence, Ephedra Tang evidence, is not absolutely dependent on the presence or absence of sweat. Rather, it is necessary to identify the evidence to see, if there is ephedra soup evidence, even if there is sweating, you can also use ephedra type of formula, such as clinical fever for patients with pneumonia, I often identify the use of Qinglong soup, small Qinglong soup additions and subtractions, in order to achieve rapid relief of the surface, fever, shorten the course of the treatment purpose. The “Medical Zong Jinjian” said ephedra soup for “zhongjing open the table to expel the evil sweating the first steep medicine,” in which there is no sweat in the ephedra soup of ephedra for three two. But there are sweating and wheezing in the Ma Xing Gan Shi Tang in the ephedra for four taels, continue to sweat out of the Yue Maiden Tang in the ephedra for six taels. In Da Qing Long Tang, which is used to relieve both exterior and interior symptoms, the dosage of ephedra is also six taels. The dosage of ephedra is larger than that of ephedra in Ephedra Tang, which is a precipitating agent for relieving surface sweating. Why? All because of the problem of drug compounding. Because of the Ma Xing Gan Shi Tang, Yue Ma Tang, Da Qing Long Tang has gypsum and other drugs to support the treatment, weakening the sweating effect of ephedra, so the amount of ephedra is large, but also can be used in the sweating of the surface symptoms. Therefore, the use of ephedra does not depend on whether there is sweating. Rather, it is a comprehensive diagnosis of the four diagnoses, and if the surface is not resolved and there is evidence of ephedra, then it can be used. As in this case, although there was sweating after taking the medicine, the superficial symptoms still existed. According to the evidence, Xiao Qing Long Tang was given with additions and subtractions. Thirdly, the application of auxiliary sweating must be highly emphasized when giving antidepressants for superficial symptoms. Auxiliary sweating theory from the “typhoid fever” Gui Zhi Tang Fang after the note: “service has been, in a moment, sip hot gruel more than a liter to help the medicine, warm cover to make a moment Xu, all over the body ZZ micro seem to be sweating better …… If not sweat, more service, according to the previous method; and not sweat, after the service of a small rush between, half a day to make the three services to the end! …… If the sweat does not come out, is served to two or three doses.” Later generations extracted auxiliary sweating methods from the notes after the formula, such as slurping porridge, warming and covering, and even serving. According to clinical experience, when the auxiliary sweating method is given in the antidepressant agent, the antidepressant efficacy of sweating all over the body can be obviously achieved, and on the contrary, the effect of sweating and antidepressant is poor. Fourth, avoid sweating, excessive sweating injury to Yang. Evil in the surface, through sweating, relief of the surface, relieve muscle, etc., to achieve sweating and solution, so in a way, the positive victory over the evil and get rid of the evil out of the sign is “sweating”, sweating is the sign of the elimination of evil. But clinical sweating to achieve “all over the body ZZ micro seem to have sweat better”, to pay attention to “not to make such as water flow away, the disease will not be removed”, because “cover the sweat, sweat, but the wind to go, dampness, is not cured also. ” At the same time can also avoid sweating, excessive sweating injury Yang. In short, the surface evidence for the external evil attack on the human body first manifested symptoms. In clinical treatment, it is necessary to attach great importance to the treatment of epiphenomena, and give reasonable treatment to relieve epiphenomena, in order to cut off the disease and shorten the course of the disease. Although Zhongjing’s article is simple, but it contains a wealth of treatment rules and methods, so the former said that “Typhoid” 398 articles that 398 methods, it is worthwhile to experience the clinical details.