Hello dear Warm welcome to Healthcaremagic.com I have evaluated your query in details . * There are many possible reasons for the same as - colon motility related issues - intestinal flora disturbances - digestive enzyme issues - chronic gastritis or duodenitis - ulcer stomach or duodenum - colon stricture or narrowing - certain tumors . * Needs study of past reports and then consult expert gastroenterologist for further management guidelines . Wishing you fine recovery . Feel free to ask any further queries . Regards .