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According to: The pulse, symptoms, and treatment of *Baihe* disease (Lily Disease), *Huo Huo* disease (Gnawing Disease), Yang Poison, and Yin Poison are detailed in Volume 3 of the *Jin Gui Yao Lue* (Essential Prescriptions from the Golden Cabinet). Regarding *Baihe* disease, Zhang Zhongjing's discussion is the most comprehensive, and the treatment methods are complete. I (Wu Kun'an) have paid attention to this condition, but encountering such cases has been very rare; therefore, I dare not elaborate on it.

*Huo Huo* disease is caused by parasitic pathogens. Its presentation resembles *Shanghan* (Cold Damage) or may be a sequela of *Shanghan*. Erosion of the throat is termed "Huo" (Confusion/Parasite), while erosion of the genitalia or anus is termed "Hu" (Fox/Parasite). The patient's complexion may appear pale, red, or black intermittently; they remain silent and desire sleep, and dislike the smell of food. If the parasite erodes the throat, hoarseness occurs, treated with *Gancao Xiexin Tang* (Licorice Decoction for Draining the Epigastrium). If the parasite erodes the anus, dryness of the throat occurs, treated by washing with *Kushen Tang* (Sophora Root Decoction) or fumigating with *Xionghuang* (Realgar). Furthermore, *Huo Huo* disease corresponds to modern *Gan* syndrome (Pediatric Malnutrition Syndrome). Dental *Gan* corresponds to "Huo," and genital *Gan* corresponds to "Hu." Detailed explanations can be found in the *Yi Zong Jin Jian* (Golden Mirror of Medicine).

Commentary by Shao: The commentary on the *Jin Gui Yao Lue* states: If there are sores like millet grains inside the upper lip, accompanied by hemoptysis and internal restlessness/pain, this indicates parasites located superiorly, consuming the five zang organs. If sores develop inside the lower lip, the patient cannot sleep, indicating parasites located inferiorly.

Regarding Yang Poison and Yin Poison: Consulting the *Jin Gui Yao Lue*, Yang Poison presents with facial erythema and mottled rash resembling brocade patterns, sore throat, and expectoration of pus and blood. It is treatable within five days but untreatable after seven days. The primary formula is *Shengma Biejia Tang* (Cimicifuga and Turtle Shell Decoction). Yin Poison presents with cyanotic complexion and face, body pain as if beaten with a club, and sore throat. It is treatable within five days but untreatable after seven days. The primary formula is *Shengma Biejia Tang* minus *Xionghuang* (Realgar) and *Shujiao* (Sichuan Pepper).

Commentary by Shao: "Poison" refers to pathogenic factors that are accumulated and unresolved. Here, "Yin" and "Yang" do not refer to the yin/yang of zang-fu organs or qi-blood. Rather, based on symptoms: facial erythema, sore throat, and expectoration of pus/blood indicate pathogenic factors adhering to and manifesting on the exterior, termed "Yang." This means the pathogen affects the yang aspect of the human body, not necessarily implying an extreme heat syndrome. Cyanotic complexion, body pain, sore throat, and absence of pus/blood expectoration indicate pathogenic factors hidden and located interior to the exterior, termed "Yin." This means the pathogen affects the yin aspect of the human body, not necessarily implying an extreme cold syndrome. Therefore, both conditions utilize acrid-warm and ascending-dispersing herbs to vent the pathogen, and sweet-moistening and salty herbs to anchor the yin. In the Yin Poison formula, *Xionghuang* and *Shujiao* are removed because one fears that attacking a yin condition too aggressively might damage yin qi. When the disease duration is five days, the pathogenic factor is still shallow, making dispersion easier; thus, it is treatable. When seven days have passed, the pathogenic factor is deep, making dispersion difficult; thus, it is considered untreatable.

Note: The Yang Poison and Yin Poison mentioned by Zhang Zhongjing result from contracting abnormal qi (peculiar pathogenic factors). Entering the yang meridians constitutes Yang Poison, while entering the yin meridians constitutes Yin Poison. Hence, for Yang Poison, warm and potent herbs like *Shujiao* and *Xionghuang* are used to drive out pathogens from the yang meridians. For Yin Poison, these are removed, and only herbs like *Biejia* (Turtle Shell), *Danggui* (Angelica Sinensis), *Shengma* (Cimicifuga), and *Gancao* (Licorice) are used to enter the yin and disperse pathogens, avoiding their warm and acrid nature. If later authors describe Yin and Yang Poisons as extreme cold or extreme heat syndromes, they should indeed be treated with formulas corresponding to extreme cold or extreme heat, and one must not rigidly adhere to Zhang Zhongjing's formulas.

Commentary by Shao: Both syndromes involve sore throat because the pathogen enters downward from the mouth and nose into the throat. Severe cases may present with severe heart and abdominal cramping, extreme abdominal distension, sudden emergence of cyanotic veins throughout the body, fingernails and toenails turning dark blue like indigo leaves, trismus (lockjaw), and mental restlessness/confusion, leading to death within a day or night. In such critical stages, one need not distinguish between Yin and Yang Poison. One should merely puncture the *Zuchi* (Chize, LU5) and *Weizhong* (BL40) acupoints, as well as the sites where collaterals protrude on the ten fingers of the hands, to bleed. For milder cases, scraping therapy (*Gua Sha*) may be used, accompanied by oral administration of *Zijin Ding* (Purple Gold Pellet), leading to recovery through vomiting, purging, or sweating.