Which sputum color suggests blood?

• A. Red or pink = blood
• B. Clear = normal mucus or allergies
• C. White = asthma, COPD
• D. Yellow or green = infections

Answer: (A)

Red or pink sputum most directly signals the presence of blood in the mucus, a condition known as hemoptysis. This color change occurs when there is bleeding in the airways or lungs, which can arise from irritation, infections, bronchitis, bronchiectasis, tuberculosis, malignancy, or trauma. Even a small amount of blood in sputum warrants attention and assessment, especially if it’s accompanied by chest pain, fever, weight loss, or a larger volume of coughing up blood.

Clear mucus is typically non-bloody and seen with normal mucus production or allergies. White mucus is commonly associated with asthma or COPD. Yellow or green sputum suggests an infectious process with pus-producing organisms.