Heavy cough refers to a heavy cough, which may be caused by external evil, phlegm-dampness, phlegm-heat lung and other factors. 1. Exogenous evil: the patient’s coupling is loose, wind and evil attack, resulting in the lung qi elevation disorder, resulting in a heavy cough, accompanied by nasal congestion, fever, chills (fear of cold) and other symptoms. 2. Phlegm and dampness within: phlegm (water metabolism disorder formed by the pathological products) water and damp metabolic disorders, stagnation in the body, it is difficult to cough out, and thus there will be a heavy cough performance, accompanied by the emergence of chest tightness, coughing up white sputum, heavy body and other symptoms. 3. Phlegm-heat and lung stagnation: phlegm and dampness stagnate in the body, and heat is transformed into heat (if the evil qi stays for too long, it is transformed into heat), which affects the qi, and therefore, the cough will be heavy and turbid, and accompanied by heat, coughing up yellow phlegm, and shortness of breath. If the patient is not feeling well, it is recommended to go to the hospital in a timely manner, after clarifying the specific cause of the disease, under the guidance of the doctor for treatment.