If you swallow phlegm back into your stomach, will it be harmful to your health?

According to the subject's question, my answer is as follows. In my opinion, coughing is an instinctive protective reflex, which is actually to seek advantages and avoid disadvantages. Cough can promote all kinds of sputum produced by inhaling foreign bodies such as airway dust and sputum to be excreted through the respiratory tract and oral cavity. The advantage of this is that the respiratory tract can be kept clean and unobstructed, and the respiratory tract will not aggravate the condition or cause suffocation. No matter what method is used to relieve cough, eliminate phlegm and keep respiratory tract unobstructed, the causes of cough and expectoration should be found out before or at the same time, and the causes should be cleared and treated at the same time, so as to fundamentally avoid the problem of sputum production, that is, people often say that it is necessary to cure the root cause to stop boiling. If there is bacterial infection in the lungs that causes cough and expectoration, just take measures to relieve cough, eliminate phlegm and resolve phlegm. Because lung infection still exists, it will continue to produce phlegm. Only under the premise of controlling lung infection, relieving cough and resolving phlegm will not continue to produce phlegm.

Secondly, if sputum is produced because of a certain disease, such as tuberculosis, the sputum produced by this disease will contain mycobacterium tuberculosis, which cannot be eliminated by gastric acid, so if this sputum is always swallowed, it is likely to infect the stomach, and in severe cases, it will induce gastric tuberculosis or intestinal tuberculosis. In public places, you will see a sign that says: No spitting. Spitting everywhere is a very uncivilized behavior, and there is also the risk of infectious diseases. Therefore, when spitting, wrap it with paper towels, which can effectively prevent the spread of the virus, and then throw the paper towels into the trash can, which is more civilized and cleaner.

When you feel phlegm in your throat, take a deep breath first and then hold your breath for a while. At this time, your throat will feel itchy and then spit it out. At this time, you can spit out the sputum that is difficult to spit out. In the process of holding your breath, the alveoli will be in a bloated state, and your throat will itch, which is more conducive to exhaling. If the sputum can't be spit out all the time, it means that the sputum may be sticky and stick to the tracheal wall. At this time, you can drink more water, which can help dilute sputum and achieve the purpose of expectoration. Take more expectorants. Pears, which are common in our daily life, have the function of resolving phlegm. Boiling pears with water and adding a little rock sugar can effectively alleviate the situation of phlegm in the throat.