Simply put, white phlegm is the early manifestation of our usual cold, fever, bronchitis and pneumonia. This is basically a very common cold and fever, which can be recovered with simple treatment, and it is easy to treat without any impact on our health. Therefore, it makes sense to say that white phlegm is light, indicating that the degree of crisis of the body is very light.
Yellow phlegm basically represents our body, and there is a serious problem, which shows that an organ of our body is inflamed, especially the lungs and bronchi. Yellow phlegm will appear in the later stage of bronchitis and pneumonia, indicating that our body has been inflamed. Simple cephalosporin or other drugs have no good effect, and need to cooperate with the professional means and drugs of the hospital. At this time, we can't treat ourselves. We should consult the professional doctors in the hospital as much as possible to get the results quickly.
Black is not a good phenomenon. Most people won't see this phenomenon. It means there is something wrong with their lungs. People who smoke for a long time may be ebony, and then this phenomenon shows that the lungs have been seriously corroded. If you make a film, it is obvious that his lungs are not the same color as those of healthy people. So the probability of this kind of person getting lung cancer is dozens of times that of normal people. So the color of phlegm can really represent the health of the body.