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Treating Taiyang disease (Taiyang disease) with fever, if sweating is not induced but purgation is used instead, the exterior heat enters the chest cavity due to deficiency, where it knots and fails to dissipate with the fluid metabolism that cannot transform into sweat. This results in a condition called Da Jie Xiong Syndrome (Major Chest Binding Syndrome), characterized by hardness like stone from the epigastrium (Xin Xia) down to the lower abdomen, accompanied by severe pain that cannot be touched or pressed. The patient may present with no significant body heat, only sweating on the head, or tidal fever (Chao Re) with dryness and thirst, and a deep (Chen) and tight (Jin) pulse.

Da Huang (Cortex Rhei Radix et Rhizoma, 6 liang, washed with wine), Mang Xiao (Natrii Sulfas, 1 sheng), Gan Sui (Radix Euphorbiae Kansui, 1 qian bi). Use 6 sheng of water, first decoct Da Huang until 2 sheng remains, remove the dregs, then add Mang Xiao.

It treats Jie Xiong (Chest Binding) with stiffness of the neck, resembling Rou Ji (Soft Spasm); it also treats Yangming Heat-induced panting (Re Chuan) and early-stage edema (Shui Zhong) in patients with excess constitution.

Da Huang (8 liang), Ting Li Zi (Semen Lepidii seu Descurainiae, stir-fried), Mang Xiao, Xing Ren (Semen Armeniacae Amarum, each 0.5 sheng, skin and apricot kernels removed, stir-fried until black). First, pound Ting Li Zi and Da Huang into powder, add Xing Ren and Mang Xiao, and grind together into a paste-like consistency. Mix well to form a powder. Take one pill-sized portion (like an elastic bullet); separately, pound Gan Sui into fine powder (1 qian bi), mix with Bai Mi (White Honey, 2 he) and 2 sheng of water, decoct until 1 sheng remains, and take warm.

Da Xian Xiong Tang (Major Chest-Invigorating Decoction) treats Da Jie Xiong: Da Huang clears heat and eliminates excess; Mang Xiao softens hardness and breaks accumulation; Gan Sui drives out water and resolves retained fluid. These address the cardinal signs of heart and abdominal stone-hardness (the specific manifestation of Jie Xiong), pain with refusal to press (hardness from epigastrium to lower abdomen with unbearable pain, more severe than Cheng Qi syndrome), constipation, agitation, irritability, dryness, and thirst (same as Cheng Qi syndrome). If there is only head sweating and a deep-tight pulse (Jie Xiong caused by premature purgation leads to heat knotting with water; heat cannot vent outward but steams upward, hence only head sweats while body is dry. Deep-tight pulse indicates water restraining hidden heat, a yin pulse appearing in a yang disease). The treatment for water knotting in the chest is similar. If the neck is stiff resembling Rou Ji, add Ting Li Zi, Xing Ren, and honey pills to attack (named Da Xian Xiong Wan [Major Chest-Invigorating Pill]. Neck stiffness in Jie Xiong means evil occupies the high position of the Taiyang channel; thus, Ting Li Zi and Xing Ren are added to the previous formula to descend the evil from above. Making it a honey pill aims for a slow, gradual purge). This is the general principle for draining water evil and clearing heat-excess (the summary of Tang and Wan formulas). Do not confuse it with Taiyin Cold-Excess (Han Shi Jie Xiong should be treated with warming purgation; misusing cold medicines will cause death). Later generations modified this formula to treat heat-panting and edema with special efficacy. (Note: Wang Haicang used Da Xian Xiong Wan to treat Yangming heat-panting, and Ke Yunbo used it for early-stage excess-type edema, both achieving remarkable results. This shows that ancient formulas are valuable for flexible application; mastering analogy and extension completes the physician's art.)