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The manifestations of Lung Heat include redness appearing exclusively on the right cheek, which becomes more intense in the afternoon accompanied by a sensation of fever. The nostrils are dry and itchy; the sclerae (white part of the eyes) show red veins, or the entire eyeballs appear steamed-red with soreness, tearing, swelling, distension, and pain. Breathing is coarse and rapid, or there is急促 breathing leading to asthma/panting. There may be coughing with expectoration of yellow, thick sputum, or ineffective coughing where Lung Qi is distended causing slight elevation of the chest wall. Alternatively, rebellious Qi and surging phlegm prevent expectoration. The face may become tense and rapidly turn crimson. Stools may be dry and constipated, indicating that Lung Heat has transferred to the Large Intestine; or stools may be watery and yellow, indicating extreme Lung Heat forcing downward into the Large Intestine. Since the Lung and Stomach are adjacent, Lung Heat inevitably affects the Stomach, generating heat therein. This leads to food stagnation turning sour, chest oppression, hiccups, dizziness, vertigo, loss of taste, a yellow, thick, and greasy tongue coating, frequent vomiting, and foul breath. All these pathological forms, whether direct or indirect, are caused by Lung Heat. If there are no exterior heat symptoms (biao re), it indicates no external pathogenic infection. Treatment should strictly follow the principle of clearing Lung Heat. Applying herbs that clear heat and purify the Lung will allow Lung Qi to flow freely once the heat is eliminated, thereby calming the cough and resolving phlegm-fluids. One must absolutely avoid using wind-dispelling herbs to treat the Lung, as this will cause the wind-herbs to agitate the Lung, exacerbating the heat. Below is a proposed formula specifically for clearing Lung Heat while also treating the Stomach:

Qing Re Su Fei Ping Wei Tong Luo Fang (Clearing Heat, Purifying Lung, Calming Stomach, and Unblocking Collaterals Decoction)
Gualou Pi (Trichosanthis Pericarpium, 1.5 qian)
Kujiegeng (Platycodonis Radix, 1.5 qian)
Nixingren (Prunus Armeniacae Semen, 2 qian, stir-fried)
Guangchenpi (Citri Reticulatae Pericarpium, 1.5 qian)
Xiebeitou (Allii Macrostemonis Bulbus, 1.5 qian)
Chaozhike (Aurantii Fructus Immaturus, 1.5 qian, stir-fried)
Jineijin (Galli Gigerii Endothelium Corneum, 2 qian)
Danzhuru (Bambusae Caulis in Taeniam, 1.5 qian)
Qinglianqiao (Lonicerae Japonicae Flos, 2 qian)
Xianpiluy (Eriobotryae Folium, fresh, 2 qian, wrapped in cloth, used as a guide drug).
Decoct in water. This formula is intended for children around five years old. For infants around one year old, the dosage must be halved. Administering this formula consecutively for two doses can cure internal heat without external contraction, as well as symptoms such as Lung Heat, Stomach fullness, stagnant Qi, and oppression.

Existing formulas for clearing Lung Heat, such as Xiebai San (Draining White Powder), must absolutely not be used. The Sangbaipi (Morus Albae Cortex) and Digupi (Lycii Cortex) in that formula are herbs for treating Lung Yin deficiency. Their nature moves toward the Yin aspect, clearing heat from the blood level of the Lung. This risks drawing heat into the Yin aspect. Since the pathology originates in the Qi level, mistakenly directing it to the Blood level will not only fail to clear Lung Heat but will cause the heat to penetrate deeper, leading to various complications and making treatment more arduous.

The manifestations of Lung Cold include clear nasal discharge, rebellious Qi and cough, frequent expectoration of thin or white sputum, occasional aversion to cold in the limbs, sallow and pale complexion, white and greasy tongue coating, clear and profuse urine, loose stools, loss of taste, poor appetite, and occasional flooding of faintly sweet fluid in the mouth. All these pathological signs indicate Lung Cold.