Bronchitis is mainly divided into acute bronchitis and chronic bronchitis, and in Chinese medicine it is divided into cold cough, cold asthma, and hot cough and hot asthma. There are many herbal formulas for bronchitis. For cold cough and cold asthma, Gui Zhi plus Hou Pu Apricot Soup, Ma Huang Tang, Er Chen Tang, Xiang Sha Liu Jun Zi Tang, Yu Ping Feng San, and for hot cough, the main herbal formulas are Sang Bai Pi Tang, Qing Jin Hua Phlegm Soup, Xiao Qing Long plus Shi Fu Tang, Ma Heng Shi Gan Tang, and Xiao Chai Hu plus Shi Fu Tang. In addition to lung diseases and symptoms, we should also consider the condition of the stool when treating bronchitis. If the stool is loose, use drugs to strengthen the spleen and remove dampness; if the stool is dry and knotted, consider clearing and ventilating the internal organs and lowering the internal Qi, so that the heat on the lungs will naturally be lighter.