Constipation (also known as costiveness or dyschezia) refers to bowel movements that are infrequent or hard to pass. Constipation is a common cause of painful defecation. Severe constipation includes obstipation (failure to pass stools or gas) and fecal impaction (see also Bowel obstruction).
Constipation is common; in the general population incidence of constipation varies from 2 to 30%.
Constipation is a symptom with many causes. These causes are of two types: obstructed defecation and colonic
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