One of the first signs of a cold is green or yellow mucus. It's no reason for concern, and in fact, it means your body is working extra hard to fight off infection. White blood cells rush to battle infection, and when they've done their job, they get flushed out of the body along with the virus.
Yellow phlegm is a sign that your body is fighting off a mild infection. "White blood cells are responsible for fighting infections, and as they get picked up in the mucus, they can cause it to have a yellowish hue," says Dr. Kreel.
Does yellow mucus ever mean you are getting better after being sick? “Generally not,” Dr. Bhattacharyya says. “If you have yellow mucus, it means you still have white blood cells that are fighting whatever is actively causing inflammation or infection.”
Changes in mucus color, from clear to white to yellow to green, are part of the normal course of an illness. It's a sign that your immune system is fighting to get better. Pink, red, orange, or brown snot, on the other hand, is typically not from an illness.
In general, your phlegm will last just about as long as your cough does. For bacterial infections, you can expect to see your cough and phlegm dissipate in 10 to 14 days, even without antibiotic medications. Viral infections can last a bit longer and may keep producing phlegm for up to three weeks.
Coloured phlegm or snot does not mean you need antibiotics. In most healthy people, phlegm or snot production with or without a cough will stop as your cold or flu-like illness clears up, although it may take up to 3 to 4 weeks.
Does coughing up mucus mean you're getting better? In most cases, coughing up mucus means your body is working to fight off an infection, and it is in the healing stages. Drink plenty of fluids to help thin the mucus.
Signs and symptoms of a chest infection
coughing up yellow or green phlegm (thick mucus), or coughing up blood. breathlessness or rapid and shallow breathing.
During a common cold, nasal mucus may start out watery and clear, then become progressively thicker and more opaque, taking on a yellow or green tinge. This coloration is likely due to an increase in the number of certain immune system cells, or an increase in the enzymes these cells produce.
An infection can make mucus thicker and stickier. Infections also lead to inflammation in the mucous membranes that line the nose and the rest of your airway. This can cause certain airway glands to make more mucus. That mucus can get thick with bacteria and cells that arrive to fight the infection.
Days 3 to 5: Cough and More Nasal Congestion
You may notice that mucus from your runny nose has become thicker, with a yellow or green tinge. This usually is due to a spike in the number of white blood cells your immune system has dispatched to overcome the virus, according to the Mayo Clinic.
FALSE: If you have green or yellow mucus, it's a bacterial infection and you need antibiotics. Colds, sore throats, upper respiratory infections and influenza (the flu) are caused by viruses, which could cause colored mucus. Antibiotics won't kill, prevent or stop spreading viruses.
Common symptoms of pneumonia include: a cough – which may be dry, or produce thick yellow, green, brown or blood-stained mucus (phlegm)
Also, sputum production in viral airway infections may be clear, white, or even tinged with blood [15]. It has been shown that a yellowish or greenish sputum colour is often related to the bacterial load of patients suffering from COPD exacerbation [16], [17] or patients hospitalized due to respiratory conditions [18].
When you do cough up phlegm (another word for mucus) from your chest, Dr. Boucher says it really doesn't matter if you spit it out or swallow it.
So, to answer your questions: The phlegm itself isn't toxic or harmful to swallow. Once swallowed, it's digested and absorbed. It isn't recycled intact; your body makes more in the lungs, nose and sinuses. It doesn't prolong your illness or lead to infection or complications in other parts of your body.
Cold and flu symptoms such as a blocked nose or cough usually subside after 7-10 days and the absence of these things is quite an obvious indication that you are on the mend.
Green or yellow mucus may come from the nose which shows that the immune system is fighting the infection. It does not necessarily mean that your cold is getting worse or that you have a bacterial infection and need antibiotics.
Your doctor may prescribe antibiotics if the symptoms are severe and include high fever along with nasal drainage and a productive cough. Antibiotics may also be necessary if you feel better after a few days and then your symptoms return or if the infection lasts more than a week.
Bronchitis is an infection of the main airways of the lungs (bronchi), causing them to become irritated and inflamed. The main symptom is a cough, which may bring up yellow-grey mucus (phlegm). Bronchitis may also cause a sore throat and wheezing.
These symptoms can be unpleasant, but they usually get better on their own in about 7 to 10 days. The cough and mucus can last up to 3 weeks.