Most common cause of intestinal obstruction is?

.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.Clinical features * Pain abdomen--colicky type and recurrent and episodic * Distension, vomiting * Constipation * Reduced bowel sounds on auscultation * Previous surgical scars commonly observed * Dehydration, tachycardia, hypotension. ref:SRB&;s manual of surgery ,ed 3,pg no 870