Simply put: Yes.
By blowing your nose or "spitting out" phlegm, you are removing the substance that is clogging up your airway.
Yes, the phlegm is the body's response to counter-attack the acid which is hurting the chest and throat.
Phlegm is formed when the mucous membranes in your body try to fight infections. Phlegm is made of mucous, dead bacteria and virus, and dead white blood cells.
Swallowing phlegm is generally not harmful, as it is a natural bodily function. Phlegm can contain mucus, bacteria, and other particles, but your digestive system is equipped to handle these substances. However, if you're frequently producing excess phlegm or experiencing discomfort, it may be a sign of an underlying condition that should be addressed. Staying hydrated and managing allergies or infections can help reduce phlegm production.
Swallowing phlegm is generally not harmful, as it is mostly composed of water, mucus, and trapped particles. While it may be unpleasant, swallowing phlegm can help clear it from the throat and prevent irritation. However, if phlegm is persistent or accompanied by other symptoms, it may indicate an underlying condition that should be evaluated by a healthcare professional.
Chest pain; coughing; spitting up phlegm; wheezing, crackles, or rales; shortness of breath; and possibly fever or other constitutional symptoms. Any or all of these may be present.
Yes get the poor child some cold medicine. If it gets worse or doesn't get better in a day or two go to the doctor.
phlegm
The airway passages normally produce secretions which it uses to trap debris and using the cilia in the epithelium, remove the offending particles. During respiratory tract infections, the secretions become a medium for bacteria to grow in and this secretion is increased- now called phlegm.
Both colds and flu are caused by viruses. The color of the phlegm in respiratory viral infections such as these is very similar. If there is a secondary bacterial infection on top of the virus, the phlegm color may be darker and more greenish/yellow, but that is not always the case as symptoms can vary widely from person to person and microbe to microbe. See the related question below for differences in the cold and flu symptoms.
The act of clearing your throat is indicated by the slang onomatopoeia "hock", or "hack", and the resultant mucus as a "loogie" (lugie). This is sometimes a combination of drawing up phlegm and then expectorating or spitting, with the sound "ptui" (ptooie).Both of these acts are simulated by the word sounds, as is the term "hacking cough".Addendum:There is also the resounding "splack" as the hocked/hacked loogie hits the sidewalk immediately following the "ptui."
Yellow phlegm itself is not contagious; rather, it is a symptom that often indicates an underlying infection, such as a cold or bronchitis. The contagiousness comes from the pathogens causing the infection, not the phlegm itself. If the infection is viral or bacterial, it can be spread through respiratory droplets when an infected person coughs or sneezes. It's important to practice good hygiene to prevent the spread of any underlying illness.
Phlegm will go into your stomach and the acid in your stomach will dispose of it naturally, just the way it does when you swollow food. It is not harmful to swallow phlegm.