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Diverticulosis is not noticable on the skin.  It is a condition in the
intestine in which small sacs (called 'diverticula') form on the intestinal
wall.  Occasionally, tiny food particles (especially things like seeds
and nuts) will become trapped in a diverticulum sac.  If the diverticula
become inflammed, causing pain and constipation, the condition is known
as diverticulitis.

   BJ