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Crepitation refers to situations where noises are produced by the rubbing of parts one against the other, as in:

  • Crepitus, a crunching sensation felt in certain medical problems
  • Rales or crackles, abnormal sounds heard over the lungs with a stethoscope
  • A mechanism of sound production in grasshoppers during flight. Also called "wing snapping".

Causes of Crepitations: 1.Pulmonary oedema*** 2.Resolving pneumonia 3.Bronchiactesis 4.Lung abscess 5.Diffuse parenchymal lung disease