Phlegm is a specific type of mucus that originates in your lungs and throat. It's slightly thicker than the mucus that's produced in your nose and sinuses.
Though they're always at work, you typically only notice the sticky substances when you're sick. Mucus and phlegm are similar, yet different: Mucus is a thinner secretion from your nose and sinuses. Phlegm is thicker and is made by your throat and lungs.
Mucus in the lungs is known as phlegm or sputum. It is a common symptom in chronic lung diseases such as COPD (including chronic bronchitis and emphysema), cystic fibrosis, bronchiectasis, NTM lung disease or asthma.
Mucus is usually clear, gray, or white. Green or yellow mucus may be a sign of an infection. Brown mucus can affect people who smoke and those with black lung disease, which results from exposure to coal dust. Mucus that contains blood may be pink or red.
Phlegm is a type of mucus that comes from the lungs and respiratory tract. Problems in the lungs can cause phlegm to change color. Green or yellow phlegm can occur with an infection, but brown phlegm might be a sign of bleeding in the lungs. Typically, phlegm is clear, thin, and unnoticeable.
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.
Summary. 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.
“Normally, mucus is clear. When you have a cold or infection, it might turn green or yellow,” said Alyssa. Clear snot usually signals allergies or some kind of environmental factor that is triggering your nose to start running, such as inhaling dust or allergens. Clear snot is nothing to worry about.
Hold your breath for 3 to 5 seconds. Then—as you let that breath out [coughing]— cough 2 or 3 times. Push on your belly with your arms as you cough. [coughing] Breathe in slowly and gently through your nose, and repeat the coughing if you need to.
So here's the big question: Should you spit or swallow your phlegm? Even though it might taste nasty, “there's nothing wrong with swallowing it,” Dr. Comer says. In fact, that's probably what your body expects you to do, which is why phlegm naturally drains down into the back of your throat.
Mucus: The Warrior
Coughing and blowing your nose are the best ways to help mucus fight the good fight. “Coughing is good,” Dr. Boucher says. “When you cough up mucus when you are sick, you are essentially clearing the bad guys—viruses or bacteria—from your body.”
People with sinus infections often notice that they cough up green or yellow phlegm or that the mucus they blow out of their nose is a bright color. Sinusitis causes a lot of mucus production, and a person may find they are unable to clear the sinuses no matter how often they blow their nose.
Phlegm is a thick mucus from the lower airways due to lung inflammation or injury. Infection is a common cause, but other conditions like allergies, lung disease, and GERD can cause a productive cough. Treatment depends on the underlying cause and includes supportive care and medications.
Even if you're coughing up yellow or green phlegm, you might not need antibiotics. Your mucus color alone can't tell you if a virus or bacteria is causing your cough. If your cough lasts longer than 3 weeks, it's time to see a healthcare provider. You may need an X-ray or antibiotics.
Small amounts of white mucus may be coughed up if the bronchitis is viral. If the color of the mucus changes to green or yellow, it may be a sign that a bacterial infection has also set in. The cough is usually the last symptom to clear up and may last for weeks.
White / clear: This is the normal colour of phlegm. phlegm may be brownish in colour. to the darkest, indicates that you have an active chest infection. This means that a visit to your GP would be advisable as antibiotics and / or steroids may be needed.
If you are coughing green or yellow mucus, let your GP or health care provider know. If you are coughing up blood (or blood stained mucus), call your GP, the COVID-19 Care at Home Support Line or Healthdirect for further advice.
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].
Understanding the Signs of Pulmonary Infections
Difficulty breathing, especially during light exercise or regular activities. Chest tightness. Sharp chest pain. Body aches (myalgia)
By definition, phlegm is a byproduct of inflammation in the sinuses and the lungs. Your body is responding to some sort of irritant and is creating the phlegm to combat the issue. It can be related to a bacterial infection like bronchitis, sinusitis or pneumonia.