Phlegm heat blocking lung is also called phlegm heat blocking lung and phlegm heat inhibiting lung. It is mainly caused by exogenous pathogenic heat or exogenous wind-cold, heat caused by depression, burning lung fluid, phlegm turbidity, phlegm-heat junction and obstruction of lung collaterals. A few patients can also turn into heat due to long-term treatment of phlegm-dampness, which leads to phlegm-heat blocking the lungs. Cough and asthma are common, with thick, yellow and even bloody sputum. Cough can cause chest pain and fullness in the chest and hypochondrium. Symptoms of phlegm-heat such as red eyes, red tongue, yellow greasy tongue coating and slippery pulse may also occur.

In addition, when patients have yellow phlegm such as pus and peculiar smell, prescriptions such as water shield, pearl and wax gourd kernel can be added on this basis. Houttuynia cordata Thunb can inhibit many kinds of bacteria, such as Staphylococcus aureus, Influenza Bacillus and even Mycobacterium tuberculosis, while pearl seeds can inhibit Shigella dysenteriae, Salmonella typhi and Staphylococcus aureus. In this way, the effects of clearing heat, sterilizing and resolving phlegm are more obvious. Jinqing Huayu decoction (addition and subtraction refers to adding and subtracting drugs on the basis of the original prescription to make it more symptomatic and achieve better curative effect) has quite good curative effect on lung abscess, late lobular pneumonia and even acute attack of chronic bronchitis.

Etiology and Pathogenesis This disease is mainly caused by exogenous pathogenic heat or exogenous wind-cold, depression causing heat, heat burning lung fluid, turbid body fluid, phlegm-heat junction and obstruction of lung collaterals. A few patients can also be cured by phlegm-dampness for a long time, resulting in phlegm-heat stagnation in the lungs.

The main manifestations are cough, wheezing, or phlegm in the pharynx, which is sticky or yellow. When coughing, there is foul smell or hot air, or vomiting blood and phlegm, chest and hypochondriac fullness, cough pain, and may be accompanied by redness, body heat, thirst, red tongue, yellow greasy fur and slippery pulse. Because phlegm heat blocks lung qi, lung qi is insufficient, so cough and wheezing, yellow phlegm and persistent cough are seen. Phlegm is steaming hot and has a fishy smell. Heat hurts lung collaterals, so chest and hypochondriac pain, cough pain, or coughing up blood and phlegm. When lung heat is depressed, the face is red, or the body is hot and thirsty. The tongue is red, the coating is yellow and greasy, and the pulse is slippery, which is the image of phlegm-heat choking the lungs.

Diagnosis, tongue diagnosis, olfactory diagnosis, pulse diagnosis and chest X-ray examination. Diagnose cough and wheezing; Phlegm, thick yellow. Two of the following conditions are met: ① phlegm, cough and vomiting; ② Cough causes chest and hypochondriac pain; ③ Fever, thirst and polydipsia. Meet one of the following conditions. Phlegm is hot and smelly; Blood in sputum; The fur is yellow and greasy, and the pulse is slippery. Treatment principle: clearing heat and dispersing lung, resolving phlegm and relieving cough. Main prescription: Jinqing Huatan Decoction.