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This condition arises from cold pathogenic qi invading the meridians and collaterals, obstructing the flow of Qi and blood. The blood becomes stagnant and unsmooth, eventually forming a carbuncle on the back (Ju Fa Bei). After the pus discharges from the carbuncle, if the whites of the eyes turn blue-black and the eyes become small, this is the first adverse sign (Ni); if vomiting occurs after taking medicine, this is the second adverse sign; if abdominal pain and extreme thirst occur, this is the third adverse sign; if the shoulders, neck, and nape are stiff and immobile, this is the fourth adverse sign; if the voice is hoarse and the complexion is sallow and devoid of luster, this is the fifth adverse sign. All these conditions are considered incurable. However, other symptoms such as fever and thirst, or diarrhea and vomiting, are not sudden emergencies and can be treated gradually.

In cases of carbuncle on the back, heat pathogenic qi flows into the Fu organs. After the pus breaks out, Qi and blood become deficient, leading to accumulated heat in the Fu organs. This causes thirst and a desire to drink. If cold drinks enter the stomach and intestines, they transform into dysentery. If Stomach Qi is deficient and rebels upward, it transforms into vomiting. If this rebellious Qi is suppressed by cold-natured medicines, causing Qi mechanism obstruction, it leads to hiccups (Yue).

If the pus within the sore is not completely drained and the wound closes prematurely, although it may appear healed, it will recur. The continuous discharge of foul fluid will transform into a fistula (Lou).

This also results from cold pathogenic qi lodging in the meridians and collaterals, damaging Qi and blood, causing blood stagnation, which forms a carbuncle. In Ju Fa Bei, all Fu organs generate heat. Excessive heat dries the Zang organs, resulting in thirst. If frozen beverages enter the stomach and intestines, they transform into dysentery.

Intestinal abscess (Chang Yong) is caused by discomfort from cold-dampness and excessive anger or joy. This allows pathogenic qi to interfere with Ying and Wei Qi, settling in the intestines. When combined with heat pathogenic qi, Qi and blood accumulate and condense to form an abscess. If the accumulated heat does not dissipate, flesh and blood rot and transform into pus. The clinical manifestations include heaviness and slight rigidity in the lower abdomen, pain upon pressure, frequent urination resembling strangury, occasional sweating, aversion to cold, rough skin resembling fish scales across the body, tense abdominal wall resembling swelling. Upon pulse diagnosis, a surging and rapid pulse indicates that pus has already formed; a slow and tight pulse indicates that pus has not yet formed. In severe cases, abdominal distension occurs, and water sounds may be heard when turning over; or sores may develop around the umbilicus, rupturing to discharge pus; or pus may discharge directly from the umbilicus; or stool may contain pus and blood. Urgent treatment is required.

It is also stated: Discharge of pus and blood in the stool, resembling red-and-white dysentery but accompanied by difficult urination, indicates intestinal abscess. If one suddenly contracts intestinal abscess without recognizing it and applies incorrect treatment, it can lead to death. A sliding and rapid pulse at the Cun position indicates excess syndrome (sliding) and heat syndrome (rapid); sliding reflects Ying Qi status, while rapid reflects Wei Qi status. Wei Qi's rapid nature descends, while Ying Qi's sliding nature ascends; their interference causes blood to become turbid and degenerated. Lower abdominal fullness and hardness, occasional difficulty in urination, sweating, or recurrent aversion to cold indicate that pus has already formed. If the pulse is slow and tight, it indicates accumulation of blood stasis. If the stasis moves downward, the disease resolves; otherwise, the family will suffer prolonged grief.

Furthermore, floating and rapid pulses typically indicate fever. If instead there is shivering and aversion to cold, along with a fixed painful area, it indicates that pus is accumulating internally. A pulse where sliding and choppy qualities interact is a sign of intestinal abscess.

The *Yangsheng Fang* states: If livestock die suddenly from epidemic diseases, or if humans fall ill in summer, consuming brain tissue is inadvisable as it predisposes one to intestinal abscess.