Most people recover quickly from a cold after proper treatment and recuperation, but some patients develop a chronic cough. Some patients have an intermittent cough that worsens when they encounter hot or cold air, excitement or nervousness, while others have a lighter cough during the day and then cough incessantly at night when they are lying down, making it difficult to sleep. This “annoying” cough can sometimes last for weeks or even months, seriously affecting people’s normal work and life. As a result, many patients take various antibiotics on their own, mistaking the cough for a bacterial infection, in addition to applying various cough suppressants. We would like to remind everyone to use antibiotics with caution when coughing for a long time after a cold. Zhao Yi, Department of Rheumatology and Immunology, Xuanwu Hospital, Capital Medical University It is well known that more than 90% of acute respiratory infections, such as colds, are caused by viruses and often have nothing to do with bacteria. This is the reason why many patients do not help even after applying various antibiotics. Misuse of antibiotics will not only cause a waste of medical resources, but more importantly, will cause dysbiosis, damage to the gastrointestinal tract, liver and kidney functions, and endanger their own health. If you have a cough that does not heal after a cold, first of all, you should keep a good state of mind and avoid as much as possible the various triggers that cause coughing, such as wearing a mask outside, avoiding smoking, drinking alcohol, avoiding emotional excitement, etc. At the same time, you should pay attention to rest, do not stay up late, avoid overwork, drink more water and do not shout; for those whose coughing seriously affects normal life and rest, you can apply some cough and phlegm medicines, such as In addition, you should go to a regular hospital for relevant examinations to exclude other causes of cough. From Life Times (Feb. 6, 2009, p. 14)