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The pathogenic factors of the second Qi stage often induce Wind-Warmth (Fengwen) and Wind-Heat (Fengre). The Classics state: "Wind damages the Yang, Dampness damages the Yin." Symptoms include slight headache, body heat, manifesting as Wind-Warmth syndrome. This is because Wind damages the Wei Qi (Defensive Qi), and Dampness damages the Spleen Qi. Therefore, in Wind-Warmth disease, both Yin and Yang pulses are floating, accompanied by sweating, heaviness of the body, somnolence, heavy nasal breathing, and difficulty speaking. For the above two syndromes, purgation is contraindicated. If toxic pills containing Crotonis Fructus (Badou, 巴豆) are administered, heat syndromes will arise concurrently, and severe cases will result in death. For diseases of the second Qi stage, Guizhi Mahuang Tang (Cinnamon Twig and Ephedra Decoction) should be used to induce sweating.

Diseases of the third Qi stage mostly present with fever and have largely transmitted to the Foot meridians: Taiyang (Greater Yang), Yangming (Yang Brightness), Shaoyang (Lesser Yang), Taiyin (Greater Yin), Shaoyin (Lesser Yin), and Jueyin (Terminal Yin). Taiyang involvement manifests as fever, aversion to cold, pain in the head and nape, and stiffness of the lower back and spine; Yangming involvement manifests as body heat, eye pain, dry nose, and inability to lie down; Shaoyang involvement manifests as hypochondriac pain, deafness, bitter taste in the mouth, alternating chills and fever, and vomiting. These three Yang meridians belong to Heat syndromes. Taiyin involvement manifests as abdominal fullness, dry throat, naturally warm hands and feet, spontaneous diarrhea without thirst, or abdominal fullness with intermittent pain; Shaoyin involvement manifests as pre-existing dry mouth, dry tongue, and thirst; Jueyin involvement manifests as abdominal fullness, retraction of the scrotum, panting, stifling heat and confusion, cold extremities, and cyanotic fingernails. For diseases of the third Qi stage, cooling methods are appropriate, warming the upper and nourishing the lower; purgation with Crotonis Fructus pills is contraindicated.

Diseases of the fourth Qi stage often induce Summer-Heat (Shuqi), headache, body heat, and thirst. It should not be treated as a common Heat disease; Baihu Tang (White Tiger Decoction) is appropriate. This disease is not contagious. Subsequently, it may develop into Pi-xie (Spleen Diarrhea), Wei-xie (Stomach Diarrhea), Dachang-xie (Large Intestine Diarrhea), Xiaochang-xie (Small Intestine Diarrhea), Dajia-xie (Major Mass Diarrhea), Huoluan (Cholera-like disorder with vomiting and diarrhea), dysentery with red and white mixture, indistinguishable water and grain in stool, borborygmus with cutting pain, facial edema and foot swelling, yellow eyes, dry mouth, abdominal distension and Qi stagnation, and weakness of the hands and feet. Children suffer similarly. For diseases of the fourth Qi stage,渗泄 (percolating and draining dampness) is appropriate, such as Wuling San (Five-Ingredient Powder with Poria).

Diseases of the fifth Qi stage often induce panting, vomiting and rebellious Qi, cough, alternating chills and fever in women, and infantile maculopapular rashes. For diseases of the fifth Qi stage, Da Chaihu Tang (Major Bupleurum Decoction) or Xiao Chaihu Tang (Minor Bupleurum Decoction) is appropriate, employing harmonizing methods for the exterior and interior.