When you have a cough after pneumonia, the most important thing to be concerned about is whether the phlegm is not drained when you have pneumonia. Because actually the inflammation of the lungs is the infection, which is considered deeper or almost the deepest place inside the respiratory tract. The sputum is not very smooth, especially in the early treatment, if the pneumonia fever, when the water loss is more, and the focus of treatment is on the use of treatment for pathogens, such as bacterial pneumonia is in the anti-bacterial, viral, pneumonia in the anti-viral, this time more concerned about whether the pathogens can kill, can terminate the process of pneumonia, but often may ignore the process of sputum. However, the process of sputum removal may be neglected. Some patients feel good about the fact that they never had sputum excretion once they had pneumonia, but in fact this is a very bad thing, because inflammation of the lung is definitely seen on the film as an exuding shadow in the lung, and that area is inflamed. The best shortcut to eliminate inflammation in the lungs is to drain the sputum, just like if there is inflammation on the skin, the pus can be easily squeezed out and the inflammation will be fine, if the pus is covered inside, there is not only the possibility of leaving pus bags inside in the future, but even the internal toxicity may be contained in that place, which will cause the potential for systemic infection in the future, and it will consume the body. The actual fact is that if you don’t have phlegm when you have inflammation in your lungs, you will often be left with chronic lesions in your lungs after you get well from pneumonia. Therefore, when you cough again after pneumonia, it may be a reminder that there is still phlegm left, this time more water, appropriate use of phlegm medicine, so that the phlegm is discharged.