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Taiyang disease with a floating pulse, fever, absence of sweating, and unresolved exterior syndrome should not be treated with Baihu Tang (White Tiger Decoction). If there is thirst for drinking water and no exterior syndrome, Baihu Jia Renshen Tang (White Tiger Decoction plus Ginseng) is the primary prescription.

A floating pulse, fever, and absence of sweating indicate that the exterior syndrome remains unresolved. In such cases, Da Qinglong Tang (Major Green Dragon Decoction) should be used to simultaneously resolve both the exterior and interior pathogens; it is contraindicated to use Baihu Tang to merely clear interior heat. If there is thirst for drinking water without an exterior syndrome, it indicates that the heat has subsided after sweating. After sweating, yang qi leaks outward, so one must guard against bitter-cold herbs (such as Shigao/Gypsum Fibrosum) damaging the yang qi. Adding Renshen (Ginseng Radix et Rhizoma) to Baihu Tang clears Lung metal qi, tonifies qi, generates fluids, and transforms water into fluids. It is a miraculous formula for relieving thirst after sweating.

Shigao (Gypsum Fibrosum, 1 jin, crushed), Zhimu (Anemarrhenae Rhizoma, 6 liang), Gancao (Glycyrrhizae Radix et Rhizoma, 2 liang), Jingmi (Oryzae Fructus Glutinosus, 6 he), Renshen (Ginseng Radix et Rhizoma, 3 liang).
Add 3 liang of Renshen to Baihu Tang; prepare the rest according to the method for Baihu Tang.

In Taiyang disease, if there is no significant high fever, dry mouth and throat, irritability, and slight aversion to cold on the back, Baihu Jia Renshen Tang (White Tiger Decoction plus Ginseng) is the primary prescription.
Because the exterior syndrome has resolved, there is no significant high fever. Slight aversion to cold on the back refers to "exterior cold" mentioned in previous chapters. When yang qi invades yin positions, interior heat is generated; when yin qi invades yang positions, exterior cold is generated. Cold distant from the center lodges in the limbs and joints; cold near the center floats on the spine. Both the spine and the limbs/joints are yang positions.

When the Taiyang exterior syndrome is unresolved but there is fluid retention in the interior, Xiao Qinglong Tang (Minor Green Dragon Decoction) and Wuling San (Five-Ingredient Powder with Poria) are both formulas that resolve the exterior and drain fluids. However, the exterior-resolving herb in Xiao Qinglong Tang is Mahuang (Ephedrae Herba), while in Wuling San it is Guizhi (Cinnamomi Ramulus). They treat interior fluid retention similarly, but the wind-cold pathogen at the exterior differs. Xiao Qinglong Tang uses only Mahuang to induce sweating and drain fluids; for those with slight diarrhea, Yuanhua (Genkwa Flos) is used in the formula; for those with difficult urination, Fuling (Poria) is used. Wuling San uses both Lingzhi (Polyporus) and Ze Xie (Alismatis Rhizoma) along with Fuling to drain fluids and induce sweating. Patients with wind-stroke have more severe internal heat, dryness, and thirst than those with cold damage. Therefore, when dryness prevails, dampness is eliminated, and fire becomes excessive; when dampness prevails, dryness is eliminated, and water increases. Transmission to Yangming treated with Baihu Tang occurs due to excess dryness; transmission to Taiyin treated with Wuling San occurs due to excess dampness. Cold damage often transmits to Taiyin diseases, where water-damp syndromes are numerous; wind-stroke often transmits to Yangming diseases, where water-damp syndromes are also frequent. This explains why dryness syndromes are few and dampness syndromes are many. (Water syndromes in warm epidemics are most common, also due to excessive consumption of cold drinks that cannot be digested.)

In wind-stroke, if fever persists for six or seven days without resolution, accompanied by irritability, presenting both exterior and interior symptoms, thirst for drinking water, and vomiting immediately after drinking, this is named "Water Reversal" (Shui Ni). Wuling San (Five-Ingredient Powder with Poria) is the primary prescription.
Wind-stroke fever persisting for six or seven days exceeds the meridian cycle without resolution, leading to irritability and thirst for drink. External fever indicates an exterior syndrome; internal thirst indicates an interior syndrome. Internal thirst with immediate vomiting upon drinking indicates stagnation and retention of interior fluids. This is called "Water Reversal" because old water resides in the middle jiao, and new water is ingested; water assisting water is what the body abhors. The two waters cannot coexist and naturally reverse upward, causing vomiting. In Wuling San, Guizhi (Cinnamomi Ramulus) unblocks meridians and releases the exterior; Baizhu (Atractylodis Macrocephalae Rhizoma) dries dampness and strengthens the spleen to generate fluids; Lingzhi (Polyporus), Fuling (Poria), and Ze Xie (Alismatis Rhizoma) promote urination and drain dampness. Drinking plenty of warm water helps vaporize and disperse the medicine through the skin and hair, allowing retained water to dissipate via sweat, thereby resolving both exterior and interior conditions.