@naturalremedy4u: Understanding the Meaning of Mucus Discharge Colors from a Runny Nose Clear mucus discharge from a runny nose is generally normal and can be a sign of a healthy respiratory system. White or cloudy mucus discharge from a runny nose can indicate a viral infection, such as the common cold or flu. Yellow or green mucus discharge from a runny nose can indicate a bacterial infection, such as sinusitis or pneumonia. Red or pink mucus discharge from a runny nose may indicate irritation or inflammation of the nasal passages, such as from allergies, sinusitis, or dry air. Brown mucus discharge from a runny nose can occur when there is old blood mixed with mucus, which can be caused by injury or irritation to the nasal passages. Black mucus discharge from a runny nose is rare, but it can indicate a fungal infection, a side effect of certain medications, or, in the case of smokers, the accumulation of tar and other substances in the lungs over time. If you are a smoker and experiencing black mucus from a runny nose, it is important to quit smoking and seek medical attention to assess any potential respiratory system damage. #sinus #sinusitis #sinusinfection #mucus #runnynose #nasal #nasalinfections #health