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- Sputum: Definition, colors, causes, and when to see a doctor
Sputum is a type of thick mucus produced by the lungs This article explains the types of sputum, what causes changes, and when to speak with a doctor
- Mucus: Phlegm, Causes, Colors How To Get Rid Of It
It lines your mucous membranes and helps trap and destroy or clear out germs and harmful particles Mucus gets thick and sticky and might be white, yellow or green when you have an infection It’s also called phlegm, snot or sputum Mucus is usually thin and clear
- Sputum: Causes, Colors, Symptoms, and What It Means (2026)
Learn what sputum is, why you cough it up, what different colors mean, and when it may signal a respiratory infection or lung problem
- Sputum - Wikipedia
Sputum is mucus that is coughed up from the lower airways (the trachea and bronchi) It is commonly referred to as "phlegm" In medicine, sputum samples are usually used for a naked-eye examination, microbiological investigation of respiratory infections, and cytological investigations of respiratory system
- Phlegm Color Chart: What the Color of Your Phlegm Means
Producing clear phlegm often means your body is reacting to irritants or inflammation, while yellow or green phlegm may suggest an infection Red, pink, brown, or black phlegm sometimes signify serious issues, such as bleeding, chronic lung conditions, or inhalation of certain substances
- Understanding Sputum and What the Different Colors Mean
Sputum is a mix of cells, foreign matter, and white blood cells produced in the respiratory tract An increased amount of sputum is often due to increased respiratory inflammation and is the body's attempt to protect and heal damage to the airways
- Phlegm Color Chart: When Mucus Color Needs Attention
Phlegm color chart guide to what mucus colors may mean, when to watch symptoms at home, and when to call a doctor or seek urgent care
- Mucus | American Lung Association
In the lungs, mucus plays a key role in protecting your lungs and airways from harmful irritants Sputum and phlegm are other names sometimes used to refer to the mucus in your lungs and airways Changes in mucus amount, thickness or color may be a sign of infection or another health condition
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