Jan 22, 2024 · 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.

Sep 18, 2024 · 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 …

Sputum is mucus that is coughed up from the lower airways (the trachea and bronchi). In medicine, sputum samples are usually used for a naked-eye examination, microbiological investigation of …

Aug 2, 2024 · 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 …

May 14, 2025 · Sputum is phlegm that is coughed up from the lower airways—the trachea, bronchi, and lungs. While phlegm refers to the substance itself, sputum refers to the expectorated (expelled by …

Aug 22, 2025 · 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 …

Jul 14, 2021 · 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, …

Oct 21, 2025 · Bloody, brown, white, yellow, or green phlegm may be a sign of an underlying condition or infection. You can use a humidifier to help keep your throat and nose moist, which lowers mucus …

Apr 30, 2024 · What is sputum? Your lungs create sputum, a type of mucus that can appear when you cough due to an infection or a chronic illness.

Apr 12, 2023 · Sputum is a mucus layer that serves a protective lining. The mucus layer found in the respiratory tract prevents the area from drying out and becoming irritated. It acts as a protective …