: Conditions like pulmonary fibrosis cause scarring and stiffness; the crackles here are often "fine" and sound like Velcro being pulled apart.
: A lung infection that causes air sacs to fill with fluid or pus, often resulting in "wet" or bubbling sounds. Crackles Lung Sounds Causes
The presence of crackles generally indicates one of three underlying issues: fluid accumulation, inflammation, or structural scarring. : Conditions like pulmonary fibrosis cause scarring and
High-pitched, short, popping; like hair rubbing between fingers. or structural scarring. High-pitched
Pulmonary fibrosis, interstitial lung disease, early heart failure.
: Permanent dilation and damage of the large airways, leading to mucus buildup and frequent infections.
Low-pitched, moist, bubbling; like pouring water or ripping Velcro. Pneumonia, severe pulmonary edema, bronchiectasis, COPD.