Saltuary morning urgency to defecate at awakening is sufficient to diagnose irritable bowel syndrome if stools are not always totally formed?

Not top of list at64: Ibs is a diagnosis of exclusion. The key to your answer: what are your symptoms, duration of distress, & recent evaluation? Do you awakening from sleep due to pain, are your symptoms not intermittent but ever present or actually worsening, have bleeding/fever--if so then it is unlikely you just have ibs. Esp. at age 64, further evaluation is warranted to identify the correct diagnosis & treatment.