Causes of rhoncci in the lungs?

Rhonchi are low-pitched, rattling breath sounds often associated with obstructed airways, typically due to mucus accumulation. Common causes include respiratory infections like bronchitis, chronic obstructive pulmonary disease (COPD), and Asthma, where inflammation and secretions lead to airway narrowing. Other factors can include bronchiectasis and the presence of foreign bodies that block airflow. Effective treatment often involves clearing the mucus and addressing the underlying condition.