Abnormal lung sounds heard through a stethoscope, characterized by crackling, rattling, or clicking noises during breathing. They indicate fluid in the small airways or alveoli and suggest conditions like pneumonia or heart failure.
From French 'râle' meaning 'rattle' or 'death rattle,' describing the rattling sound made by fluid in the airways. The term entered medical English in the 18th century and is now often called 'crackles' in modern usage.
Rales sound like someone crumpling cellophane inside your chest - they're actually tiny air bubbles popping as they move through fluid-filled airways! Think of it as your lungs making Rice Krispies sounds, which tells doctors that something is making your normally dry airways wet and sticky.
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