Swallowing phlegm may affect your health.
The components of phlegm are mainly bacteria and some dirt inside the respiratory system, as well as some apoptotic cells inside the respiratory system. Although the phlegm is full of bacteria and other substances, after being swallowed back, the phlegm is going to enter into the intestines and stomach because there is a powerful gastric acid inside the stomach, so normally, these harmful substances will be broken down.
However, there are some special cases that will have an effect on the body, such as lung infections, tuberculosis, etc. will also produce more sputum, especially the sputum of patients with tuberculosis may have tuberculosis bacilli, which may affect the intestinal tract after swallowing, and may lead to the occurrence of intestinal tuberculosis.
It is recommended not to swallow the phlegm, but to spit it out in a tissue, and not to spit anywhere. If the symptoms of coughing and sputum are not relieved for a long time, you should consult a doctor.