Lung carbuncle can be divided into four stages: initial stage, carbuncle stage, pus stage and recovery stage, which are mainly characterized by cough, chest pain, fever, spitting and vomiting of foul-smelling pus and blood sputum. 1. Early stage: sputum is white or yellow, small in quantity, sticky in quality, without special odor, and there are symptoms such as coldness, fever, cough and other symptoms of lung defense. It can be treated with the addition and subtraction of Yin Qiao San. 2. Carbuncle stage: the sputum is yellowish-green in color, in large quantity, sticky and with fishy smell, with symptoms of phlegm-heat and stagnant toxin embedded in the lungs, such as high fever, chills, cough, shortness of breath and chest pain. It can be treated with Qianjin Reed Stem Soup combined with Rujin Antidote San. 3. Pus stage: discharge a large amount of foul-smelling pus sputum or pus and blood sputum, the quality of which is like rice porridge, with a fishy odor, it can be treated with the addition and subtraction of Jiawei Platycodonopsis Soup. 4. Recovery stage: the fever gradually subsides, cough decreases, sputum gradually decreases, sputum odor decreases, sputum becomes clear and thin, the spirit gradually returns to normal, and the diet becomes better, etc. The patient can be treated with Sasanqua Lung Clearing Soup or Platycodonopsis Almond Decoction with additions and subtractions. If there are any related symptoms, it is recommended to consult a doctor in time for early treatment.