How creptiation occurs in pneumonia?

Crepitations in pneumonia occur due to the presence of fluid and inflammation in the alveoli of the lungs, which leads to the accumulation of mucus and exudate. When a patient breathes, air passing through these fluid-filled areas creates small crackling sounds, known as crepitations or "rales." This phenomenon is a result of the opening of collapsed alveoli and the movement of air through the fluid, indicating the presence of infection and impaired lung function. Clinically, crepitations are often assessed through auscultation and can help in diagnosing pneumonia.