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Leech (prepared by stir-frying) *Tabanus* (remove wings and feet, prepare by stir-frying, 20 each) *Rhei Radix et Rhizoma* (3 liang, washed with wine) *Persicae Semen* (25 seeds, remove skin and tip). The above four ingredients are pounded and divided into four pills. Boil one pill in one sheng of water until reduced to seven he, then administer. At this time, blood stasis should be discharged; if not discharged, administer again. ∶ Refers to a period of one week.

In Taiyang disease accompanied by fever and fullness in the lower abdomen, urination should be difficult. If it is now smooth, it indicates the presence of blood stasis. It must be purged; do not use other medicines. *Didang Wan* (Madder Pill) is appropriate. Fever combined with lower abdominal fullness and smooth urination—only when all three conditions are present can it be definitively diagnosed as a blood syndrome. "Do not use other medicines" means that for this syndrome, blood stasis must be gently purged; using a pill formulation allows for a gradual downward movement.

*Genkwan Flos* (prepared by stir-frying) *Kansui Radix* *Euphorbiae Pekinensis Radix* (equal parts) *Jujubae Fructus* (10 fruits). The above three ingredients are separately pounded into powder. Add one sheng and half of water, first boil ten plump *Jujubae Fructus* until reduced to eight he, strain, add the medicinal powders. Strong individuals take one qian bi; frail individuals take half a qian bi. After obtaining rapid diarrhea, nourish oneself with millet porridge. Administer warm on an empty stomach at dawn. If the discharge is scant and the pathogen remains, administer again the next day, increasing the dose by half a qian bi.

In Taiyang Wind-stroke syndrome, with diarrhea and vomiting/retching, if the exterior syndrome has resolved, internal attack may proceed. If the patient sweats, attacks occur at specific times, has headache, epigastric stuffiness and hardness/fullness radiating to the hypochondrium, this is due to fluid retention. Dry retching, shortness of breath, sweating without aversion to cold indicates the exterior is resolved but the interior is disharmonious. Absence of aversion to cold confirms exterior resolution. All the aforementioned symptoms indicate interior disharmony. This applies to all fluid-retention syndromes, not just Cold Damage. *Shizao Tang* (Ten Jujube Decoction) is the primary treatment. This decoction is used to purge accumulated fluid.

*Rhei Radix et Rhizoma* (6 liang, peeled) *Natrii Sulfas* (1 sheng) *Kansui Radix* (one qian bi). The above three ingredients: add six sheng of water, first boil *Rhei Radix et Rhizoma* until reduced to two sheng, strain, add *Natrii Sulfas*, boil for one or two boils, add *Kansui Radix* powder, administer one sheng warm. Stop subsequent administration after obtaining rapid purgation.

In Taiyang disease, if the pulse is floating, active, and rapid: floating indicates wind, rapid indicates heat, active indicates pain, and rapid also indicates deficiency. Headache, fever, slight night sweats, yet aversion to cold persists, indicating the exterior is not resolved. If the physician erroneously uses purgation, as stated in the Classics: "When a disease originates from Yang and purgation is wrongly applied, heat enters and forms Chest Binding," this is the case. An active/rapid pulse changing to slow indicates further depletion of healthy qi. Rejection pain within the diaphragm, emptiness in the stomach, rebellious qi disturbing the diaphragm, shortness of breath, irritability, mental restlessness (*Wu Liao*), internal sinking of yang qi, hardness in the epigastrium—this constitutes Chest Binding (*Jie Xiong*). *Daxiexiong Tang* (Major Xiexiong Decoction) is indicated. This passage details the cause and manifestations of Chest Binding: because the pathogen was in the Upper Jiao, erroneous purgation depleted the Qi of the Upper Jiao, allowing the pathogen to sink inward. This syndrome is distinct from the *Chengqi* method. If Chest Binding does not form, but only the head sweats while the rest of the body is dry, with sweat stopping at the neck, and urination is difficult, jaundice will inevitably develop. This occurs because erroneous purgation prevents the pathogen from sinking into the Upper Jiao, causing it to stagnate between the skin and muscles, thus presenting these symptoms. In Cold Damage after six or seven days, if there is Heat-Excess Chest Binding with a deep and tight pulse, pain in the epigastrium, and hardness upon palpation like stone, this further clarifies the signs of Chest Binding. *Daxiexiong Tang* is indicated.

In Cold Damage lasting over ten days, having passed through the meridians, with heat binding internally and alternating chills and fever, *Da Chaihu Tang* (Major Bupleurum Decoction) is given. However, if there is Chest Binding without significant heat, this is water binding in the chest and hypochondrium. Chest Binding itself involves no other pathological products, only the stagnation of Qi and water. Slight sweating only on the head indicates heat binding in the upper part. *Daxiexiong Tang* is indicated.

In Taiyang disease, after severe sweating followed by erroneous purgation, if there is constipation for five or six days, dry tongue with thirst, fluid retention in the chest, slight tidal fever in the late afternoon, hardness, fullness, and pain from the epigastrium down to the lower abdomen that cannot be touched, knowing that despite prior sweating and purgation the pain is so severe, it is known that this is not a solid exuberant pathogen. Previously mentioned: "Rejection pain within the diaphragm." Also: "Hardness in the epigastrium like stone," referring specifically to the Upper Jiao. Here: "Hardness, fullness, and pain from the epigastrium to the lower abdomen" indicates pain throughout, originating from the epigastrium, which is distinct from *Chengqi* syndromes. *Daxiexiong Tang* is indicated.

In Cold Damage after five or six days, with vomiting and fever, the *Chaihu* syndrome criteria are present, but erroneous purgation with other medicines was performed. If the *Chaihu* syndrome persists, administer *Chaihu* decoction again. Although purgation has been performed, it is not a counter-indication; the patient will likely experience shivering and trembling, followed by fever and sweating, leading to resolution. As the pathogen moves inward and healthy qi becomes more deficient, sweating is difficult. If the epigastrium is full, hard, and painful, this is Chest Binding, and *Daxiexiong Tang* is indicated.