What are these sticky phlegm balls you cough up?

Sticky phlegm balls that you cough up are typically mucus that has thickened and clumped together due to various factors, such as respiratory infections, Allergies, or irritants in the air. This mucus serves to trap pathogens and particles to protect the respiratory system. When conditions cause excessive mucus production or changes in its consistency, it can form these noticeable clumps. If this persists or is accompanied by other symptoms, it's advisable to consult a healthcare professional.