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Mechanism of Abdominal pain

Abdominal pain is the most important and commonest alimentary symptom.
Mechanism of abdominal pain are the following
  • Spasm or stretch of the smooth muscles of hollow viscus
  • Ischemia of viscera - Spleen, intestine etc.
  • Stretch of the capsule - Hepatic pain ,Stretch of Glisson's capsule
  • Pain from parietal peritoneum - Inflammation, malignancy, irritation etc.
  • Referred pain to abdomen
  • Psychogenic - Depression, somatisation disorder