Most common cause of bowel obstruction is
.ADHESIONS AND BANDS - Adhesions and bands are the commonest causes of intestinal obstruction in Western countries. In India, hernia and then adhesions are the two common causes of intestinal obstruction. Causes- * Infection due to peritonitis, appendicitis, postlaparotomy, and other acute infective abdominal conditions. Type I--Fibrinous adhesions occur during 5-10th postsurgical period. It usually gets resolved completely. It is avascular and flimsy. Type II--Fibrous adhesions. Due to lack/poor blood supply, bowel gets attached to pa of peritoneum or omentum or other pas of the bowel with dense vascular adhesions to maintain blood supply. It will persist and precipitate intestinal obstruction, often-subacute and recurrent type. Adhesions due to tuberculosis are severe, dense and difficult to separate. ref:SRB&;s manual of surgery ,ed 3,pg no 870
Malignancy
Vovulus
Peritoneal adhesions
External hernia
G.I.T