Everyone should have the experience of spitting up. Whenever you have a cold or throat discomfort, you always feel that something exists in your throat, which is what we call phlegm, and you always feel that you can’t spit it up, which makes you very uncomfortable. Sputum is a fluid secreted by the human respiratory tract due to stimulation, and there are epithelial cells, inflammatory cells and various microbial pathogens in the sputum, and spitting is also a way of detoxification. Spitting is not very elegant, but if you do not spit, it may lead to bacteria into the lungs or other human organs, which is not good for the body, so you should also pay attention to civilization when spitting. If we look carefully, we will find that the color of our own sputum is not constant, sometimes yellow, sometimes white, but in fact the different forms of sputum will also reflect the current state of our own body. In folklore, there is often the saying “yellow phlegm is light, white phlegm is heavy, be cautious when spitting up black phlegm”, but many people are very confused about such a saying, what exactly does it mean? Is it true that “yellow phlegm is light, white phlegm is heavy, and black phlegm should be spit out with caution”? Sputum actually has many kinds of performance, often showing “yellow, white, red, green, black” and other colors, the reason for the color change of sputum is mainly because the respiratory system is infected, the respiratory system is stimulated by bacteria, viruses, resulting in the mucous membrane of the trachea constantly secrete liquid, thus forming sputum, the different colors of sputum means Different colors of sputum means that different organs of the human body have diseases, so this saying is true to a certain extent. What exactly does this phrase mean? The most common phlegm in the human body is yellow phlegm, and when the human body has a wind-heat cold, the color of the phlegm coughed up is yellow, because the heat of the human body will invade the lungs, resulting in excessive lung fire yellow phlegm. Secondly, the cause of yellow phlegm may also be bacterial infection, such as common pneumococcus, Staphylococcus aureus, anaerobic bacteria, etc. These bacteria often cause inflammation in the respiratory system, stimulating the secretion of phlegm, and then the body will cough up some of the bacteria along with the phlegm. If coughing yellow phlegm is accompanied by violent coughing, big wheezing, runny nose and thick phlegm, it means that you need to take medicine for wind-heat colds, such as loquat paste, etc. You should also drink more water that can clear heat and stop coughing in normal times, such as chrysanthemum tea and lemon tea. If you simply cough yellow sputum and it lasts for a long time, it may represent inflammation in the trachea and lungs, so it is best to have it checked in time. Second, white phlegm heavy White phlegm is also more common in the body, for some patients suffering from bronchitis or the presence of purulent infection, wind and cold, often cough up white phlegm. In the case of chronic bronchitis patients will have a long-term cough of white phlegm, especially in the morning when the cough is most serious, when the phlegm often appears as white foam or mucus-like. When a patient has a cold or wind chill it can also lead to white sputum in the lungs. But in fact, these are only the more common conditions, and there are many other diseases that can cause white phlegm to appear, such as excessive cold and dampness in the body, weakness of the spleen and stomach, and abnormal metabolism. Patients want to relieve their own white phlegm, we should want to figure out what causes it, if it is due to bacterial infection should take some antibacterial drugs, if it is only wind-cold cold should do a good job of keeping warm, usually drink more water, help the recovery of the cold. If you spit white phlegm for a long time, you can always brew licorice tea to drink, which has the effect of diluting phlegm and relieving bronchial discomfort. Third, black phlegm caution appear black phlegm should be considered whether there is chronic pharyngitis, rhinitis, bronchitis and other inflammatory diseases, these inflammatory diseases will lead to the rupture of human capillaries, making phlegm black. In addition, when the human body’s lungs are damaged and toxins accumulate too much, it will also lead to black sputum, which is relatively rare in life, and once it appears, it is best to have a timely examination. In life it is best to stay away from places with excessive pollution, quit smoking in time, and eat more food that nourishes and moistens the lungs, such as snow pear, silver fungus, wolfberry, etc. The color of phlegm often suggests that the health of the human body has problems, if only a short period of coughing phlegm may be a minor disease, if a long period of sustained coughing phlegm, we should be alert to the existence of infection, lung, bronchial and other parts of the body whether there is disease.