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The four syndromes mentioned above have already been fully discussed in the *Taiyang Chapter*.

The general principle is that vomiting therapy is suitable in spring.
During spring, yang qi ascends to the upper part of the body, and pathogenic factors also reside in the upper part; therefore, vomiting is appropriate.
When using a decoction for vomiting, stop as soon as the condition improves (zhong bing); there is no need to consume the entire dose.
The key lies in appropriateness, avoiding excessive treatment.
Note: Zhao's edition includes the following passage here: "If the symptoms resemble those of the Guizhi Tang syndrome, but the head does not hurt, the neck is not stiff, the cun pulse is slightly floating, the chest feels obstructed and hard, qi rushes up to strike the throat, and breathing is difficult, this indicates cold in the interior, and vomiting should be induced." The annotation states: "Another version says: This is due to long-standing phlegm in the interior, and vomiting is appropriate."
For various excess conditions in the chest/epigastrium (Zhao's edition notes: one version reads 'cold'), if the patient experiences depression and pain in the chest, cannot eat, desires someone to press on the area, yet instead produces saliva and sputum, and suffers from diarrhea more than ten times a day, while the pulse is surprisingly slow and the cun position pulse is slightly slippery, vomiting may be indicated. After vomiting, the diarrhea will cease.
"Various excess conditions in the chest" refer to either phlegm-excess, heat-stagnation, or cold-binding in the chest, causing stagnation and pain, inability to eat, and a desire for pressure, which paradoxically induces saliva and sputum. If the pathogen were in the lower jiao, pressing would cause qi to descend without producing saliva/sputum. Since pressing here induces saliva/sputum, it confirms the pathogen is in the chest. The Classics state: "In cases of diarrhea with a slow and slippery pulse, there is internal excess." Now, with diarrhea occurring more than ten times a day, a surprisingly slow pulse, and a slightly slippery cun pulse, this indicates upper excess; thus, vomiting is appropriate. The *Yu Han Jing* states: "If upper excess persists, use vomiting to drain it."
Note: Zhao's edition also includes the following passage here: "In Shaoyin disease, if food intake immediately causes vomiting, the heart feels uncomfortable, and there is an urge to vomit but inability to do so, vomiting is appropriate."
For retained food in the upper jiao (Zhao's edition reads 'guan'), vomiting is indicated.
For retained food in the middle or lower jiao, purgation is appropriate; for retained food in the upper jiao, vomiting is indicated. The *Nei Jing* states: "Where the pathology is high, induce evacuation from above (yue zhi); where it is low, guide it out from below (jie zhi)."
If a patient presents with cold limbs (Zhao's edition reads "bing shou ni leng", meaning coldness extending to elbows and knees), a suddenly knotted pulse, due to alien qi residing in the chest; epigastric fullness and irritability, desire to eat but inability to do so, the pathology is in the chest, and vomiting is indicated.
This corresponds to the Genti San syndrome described in Volume 6, Jueyin Chapter. That text mentions a suddenly tight pulse, whereas this text mentions a suddenly knotted pulse; this is the only difference. A tight pulse indicates internal excess; a sudden tightness suggests the excess is not deep, indicating the pathogen is in the chest. A knotted pulse indicates solidification; a sudden knotting suggests the solidification is not deep, also indicating the pathogen is in the chest. Therefore, the syndromes and treatments are identical.