The color of your phlegm can indicate different health issues:
Clear: Normal, healthy mucus; no infection.
White/Grey: May indicate congestion or viral infection.
Yellow: Sign of the immune system fighting infection; often viral or early bacterial infection.
Green: Suggests a bacterial infection; prolonged illness or sinus infection.
Pink/Red: Presence of blood, which could be due to irritation, injury, or serious conditions like pneumonia or tuberculosis.
Brown: Could indicate old blood, smoking effects, or inhalation of pollutants.
When to see a doctor: If phlegm is green, pink/red, or brown and persists for more than a week, or if accompanied by fever, chest pain, or difficulty breathing, seek medical advice promptly.