Objective: To determine the frequency of internal hemorrhoids in patients presented with lower gastrointestinal bleeding undergoing colonoscopy. Patients And Methods: The six months cross sectional study was conducted from 16 November 2011 to 15 May 2012 in the department of Gastroenterology, Liaquat National Hospital, Karachion patients presenting with lower gastrointestinal bleeding. History, examination and investigations were carried out. Then Lower gastrointestinal endoscopy was performed. Patient’s information was recorded on proforma and analyzed by using SPSS-17.0. Results: Total 203 patients were explored and the mean age of the patients was 43.06 ±12.05 years (95%CI; 41.40 to 44.73). Out of 203 patients, there were 111 (54.7 %) males and 92 (45.3%) females, with 1.2:1 male to female ratio. Out of 203 patients, hemorrhoids was present in 76 (37.4 %) patients and it was the most common cause of lower GI bleed. Out of 76 patients, 35 (46.05%) were male and 41 (53.94%) were females. 60 (78.94%) patients had bright red colour while 16 (21.06%) patients had maroon colour blood. 24 (31.57%) patients had mild, 44 (57.89%) patients had moderate while bleeding severity was severe in 8 (10.52%) patients. Hemorrhoids were more prevalent in age group between 31 to 50 years of age Conclusion:The frequency of internal hemorrhoids in all patients with lower gastrointestinal bleeding undergoing colonoscopy is high. Key Words: Lower GI Bleeding, hemorrhoids, Lower GI Endoscopy.