Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain the symptoms no urge to evacuate the bowels along with a hisotry of diabetes can be due to causes like: -Sudden changes in dietary habits. -Excess intake of antacids. -Irritable bowel syndrome. -Excess intake of dairy. -Diabetes, stress. -Lack of appropriate physical activity. -Side effects of medicines. -Thyroid disorders etc.. I would suggest you to consult a Gastroenterologist and get evaluated and he can advise you get investigations done like Colonoscopy, Barium swallow, hormonal assy etc to confirm the cause.. Treatment of the cause can relieve the symptoms.. You can also be advised to take laxativs like Polyethylene glycol [Miralax], castor oil also acts as a lubricant and laxative.. You can also be advised to take Psyllium husk or Lactulose.. Take more fibres in diet, plenty of water and do moderate workout.. You can also be advised medications like Lubiprostone or Linaclotide.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.