Brief Answer: Physiological changes or Functional. laxatives. Detailed Answer: Hello, I have gone through your query and understand your concern. As the age increases, there are lot of physiologic changes in our body occurs. Older peoples suffer more bowel and abdominal problems due to this age problems. Apart from this age related physiologic changes, aged peoples are more prone for many intestinal disorders both functional as well as organic. His Colonoscopy just shows polyps and it too removed. Thus we have to think of the problem may be either physiological, functional or outside of the bowel. Most the time constipation at this age is functional and is also associated with abdominal pain. Others are Pelvic floor constipation and slow transit constipation. In this, difficult or inadequate expulsion of stool due to faulty coordination of the abdominal and pelvic floor muscles, excessive or impaired perineal descent, or anorectal structural abnormalities. In slow transit constipation, There is some degree of partial paralysis in the colon resulting from dysfunction of the colonic nerves, smooth muscle or both, resulting in delayed evacuation. It may occur as part of a generalized motility disorder affecting the stomach, intestine and/or colon. One condition we have to think is Intestinal Pseudo- Obstruction. It is a nerve or muscle problems prevent normal bowel contractions. As a result, Old people with the condition have problems with the movement of food, fluid, and air through the intestines. Electrolyte deficiency like Hyponatremia and hypokalemia may cause this constipation. Check his serum electrolytes. Most of the times, the cause for this condition is unknown. Investigations like anorectal manometry, traditional proctography or MRI defecogram will be helpful in diagnosing cause for this functional causes. He have to exercise regularly and need some diet changes. He need some bulk forming laxatives like polycarbhophil mixed in 2 ounces of water will be helpful. Advise him to avoid dehydration. Advise him to try every mornings beginning with mild physical activity sometimes just stretching in bed and a hot, preferably caffeinated beverage and possibly a fiber cereal followed by another cup of a hot beverage and all within 45 minutes of waking. This routine augments early morning high-amplitude peristaltic contractions by incorporating multiple stimulators. Further he need some pelvic strengthening exercises. Hope this helps. Please write back for further queries. Wishing you good health.

---