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Spring-warmth disease presents with sweating, slight aversion to cold, pain in the head and forehead, fever, thirst, and a wiry-long pulse. This indicates that warm pathogenic factors are in the Qi level (Qi Level). It is appropriate to use Apricot Seed (Xingren), Mint (Bohe), Forsythia (Lianqiao), Kudzu Root (Gegen), Qian Niu Zi (Da Li - *Note: Contextually likely referring to a specific herb like Pharbitis Seed or local usage, kept as Da Li*), Water Chestnut Peel (Lingpi), Black Gardenia (Hei Zhi), Mulberry Leaf (Sangye), and Loquat Leaf (Pipaye). These herbs are lightly bitter and slightly pungent, used to clear heat from the Qi level.

Generally, warm diseases, similar to the initial stage of Cold Damage (Shanghan), first injure the Yang meridians before transmitting. However, Cold Damage focuses on the manifestations of the Six Meridians (Six Jing), distinguishing Ying, Wei, Qi, and Blood levels only after transmission occurs. In contrast, warm diseases focus primarily on the Ying, Wei, Qi, and Blood levels; once the pathological trend is established, they then incorporate the manifestations of the Six Meridians. Why? Cold Damage begins with the Taiyang (Greater Yang) meridian, then transmits sequentially to Yangming (Yang Brightness) and Shaoyang (Lesser Yang), and finally enters the Yin meridians. Warm diseases, however, transmit infinitely after the Taiyang stage. If one does not first clearly distinguish and differentiate the Ying, Wei, Qi, and Blood levels, the treatment direction becomes boundless and ungraspable. Therefore, *Zhongfutang Wenre Lun* states: "Heat pathogens enter from above, first attacking the Lung, and may reversely transmit to the Pericardium." It also states: "After the Wei level, one discusses the Qi level; after the Ying level, one discusses the Blood level." Understanding these principles to weigh the relationships among Ying, Wei, Qi, and Blood is most crucial. After sweating, if there remains slight aversion to cold, fever, forehead pain, thirst, and a long pulse, this indicates the pathogen is at the exterior of the Yangming meridian. Although the external Wei-level pathogen has dispersed, the heat in the Qi level remains uncleared, and signs of further transmission are evident. Therefore, Gegen, Bohe, Sangye, Da Li, and Pipaye are used to open and vent the exterior; Lianqiao, Hei Zhi, Gualou Pi, and Xingren are used to benefit Lung Qi. This allows the pathogens in both the Wei and Qi levels to be resolved simultaneously, preventing the pathogen from transmitting to the Yangming Fu organs and causing macules, jaundice, or mania.

After sweating in spring-warmth disease, if the head no longer hurts, the body is hot without aversion to cold, the tongue coating gradually turns yellow, coughing is accompanied by hypochondriac pain, and the pulse is wiry and rapid, this indicates warm pathogens invading the Lung. It is appropriate to use Xingren, Xiang Bei Mu (Eleutherococcus Fruit/Bellflower Root variant, specifically Fritillaria Thunbergii), Shashen, Sangye, Bohe, Gualou Pi, Lianqiao, Doulouhua (Sonchus Flower), and Pipaye. These herbs are light and ascending, designed to ventilate and benefit Lung Qi.

The Lung resides at the highest position, its nature is empty and hollow, connecting externally to the Wei exterior and governing internal Qi transformation. When warm pathogens initially arise, they first attack the Lung. The Lung governs Qi and corresponds to the skin and hair. Skin and hair constitute the Wei exterior. Thus, at the onset of warm diseases, it is common to have no headache but only severe chills. Now, after sweating, with no headache and no aversion to cold, it indicates that the exterior pathogens in the skin and hair have been vented and released. The remaining symptoms—body heat, yellow tongue coating, and wiry or rapid pulse—indicate that internal heat remains uncleared. Accompanied by cough and hypochondriac pain, the pathogen still resides in the Lung. If not ventilated and released, it will inevitably sink inward. Therefore, Shashen, Sangye, Xingren, Xiang Bei Mu, Bohe, Lianqiao, Doulouhua, and Pipaye are used. These are selected for their light aroma and thin nature, acting precisely on the Lung's location. One dares not over-clear heat or over-ventilate the exterior, lest it cause the condition to linger and become chronic.