Have you ever had such an experience, a cold or throat discomfort will want to cough, then someone will tell you “hold back, do not cough out, slowly will be good, or it is likely to be really cough ……” Now the doctor this gentleman reminded You must not do this, if you want to cough, cough it out, do not hold back, it will cause problems. The left lung of a young man in Hangzhou was almost ruined. It is a normal physiological reaction to have a runny nose and cough, but if you hold it in and don’t cough, will the result be beneficial or harmful? The personal experience of a young man from Hangzhou, Xiao Chen, tells us that the consequences were serious, with a high fever that wouldn’t go away and almost scrapping half of his lungs. The whole thing still has to start from a month ago, Xiao Chen sudden onset of the flu, and this time the disease came especially heavy, he also fever, cough, sore throat, especially when coughing, throat pain like a knife in the cut, in order to try to avoid this severe pain, he thought of a way to hold back not to cough. However, what he could not have imagined was that such a small wrong move would bring about a week-long fever. The doctor at the respiratory department of Hangzhou First Hospital recommended that he be hospitalized because the medication alone could no longer suppress his raging condition. On the same day, he had a lung CT done. The image showed that his left lung was like a stone, and all the channels in his lung were blocked tightly. What is the “foreign body” that can be so powerful? For Xiao Chen’s case, the respiratory specialists were also very puzzled, and while he was given the strongest antibiotics, he was soon scheduled for a bronchoscopy. Once the camera was in, it was seen that the lung passages were filled with something more viscous than jelly, and even the suction equipment could not be sucked out, and could only be removed piece by piece by forceps. It was not until we saw these things from the lung channels that it dawned on everyone that what was blocking the lungs was actually coagulated sputum. Because one bronchoscopy did not completely remove the clogged phlegm, Chen had a second bronchoscopy a few days later, and so it took a week for his high fever to go down, and then it took another 2 weeks of recuperation in the hospital to recover. Why can holding in a cough when you have a cold have such terrible consequences? Shen Ling, deputy director of the respiratory department of Hangzhou First Hospital, said: “Generally, in the absence of illness, the human lungs also produce a certain amount of phlegm, just because the amount is small and we swallow it unconsciously. However, in the case of a cold or more serious pneumonia, the lungs produce a lot of phlegm, which is expelled from the body by coughing. If you don’t cough, the phlegm will not only not be expelled in time, but will also accumulate in the lungs and block the channels, further aggravating the inflammation of the lungs and making it difficult to control the disease.” Therefore, whether it is a common cold or severe pneumonia, the drainage of sputum is highly emphasized in the treatment process, and patients should never refuse to cough for fear of pain, as Xiao Chen did. At the same time, as a patient’s family, it is necessary to master some methods to help drain the phlegm, such as: patting the back. If coughing or patting still fails to expel sputum, it may be necessary to consider hospital aspiration.