Most common cause of lower gastro intestinal bleeding is

.Diveiculitis is the second stage due to inflammation of one or more diveicula with pericolitis.It presents with persistent pain in left iliac fossa, fever, loose stool, recurrent constipation, tenderness in right iliac fossa, palpable and thickened sigmoid colon. P/R may reveal a tender mass. Features of diveiculitis - Pain in left iliac fossa which is constant radiates to back and groin, tenderness, bloody stool, often massive haemorrhage, fever, rigidity and mass in left iliac fossa. Mass is usually tender, firm, resonant, nonmobile. ref:SRB&;s manual of surgery,ed 3,pg no 821