Constipation in older adults: Warning signs, complications and care
In older adults, newly developed constipation or a significant change from previous bowel habits should be carefully evaluated to rule out serious medical conditions, including colorectal cancer. Most other cases can be improved through dietary changes, adequate water intake, physical activity, establishing regular bowel habits, and using medications as prescribed.
1. What Is Constipation?
Constipation is not simply having infrequent bowel movements. A person may have fewer than three bowel movements per week, dry, hard, or lumpy stools, excessive straining, painful bowel movements, a sensation of incomplete evacuation, a feeling of blockage in the anus, or the need for manual assistance.
Does Not Having a Bowel Movement Every Day Mean You Are Constipated?
Not everyone needs to have a bowel movement every day. A person who has bowel movements about three times a week but passes soft stools easily and without discomfort may still be considered normal. Conversely, a person who has daily bowel movements may still be constipated if they frequently need to strain or have very hard stools. The important consideration is whether the symptoms are persistent, recurrent, or different from the person’s previous bowel habits.
2. Why Are Older Adults More Prone to Constipation?
With aging, intestinal motility and the sensation of needing to have a bowel movement may decrease. The abdominal muscles, pelvic floor muscles, and anal sphincter may become weaker, making it more difficult to pass stool. The risk of constipation is also higher in people who are frail, have dementia, Parkinson’s disease, stroke, diabetes, or prolonged periods of bed rest.
Common causes include:
| Cause Group | Specific Causes |
|---|---|
| Diet | Eating too few vegetables, fruits, legumes, and whole grains. Drinking too little water due to reduced thirst or fear of frequent urination. Difficulty chewing, difficulty swallowing, poor appetite, or malnutrition |
| Lifestyle | Low physical activity, prolonged sitting or lying down. Frequently delaying bowel movements |
| Coexisting medical conditions | Neurological conditions such as Parkinson’s disease, stroke, and spinal cord injury; diabetes, hypothyroidism, or pelvic floor dysfunction |
| Medications | Certain medications such as opioid pain relievers, anticholinergics, antidepressants, antipsychotics, medications for Parkinson’s disease, calcium channel blockers, diuretics, iron, and calcium… |
Patients should not stop their current medications on their own. When visiting a doctor, they should bring a complete list of prescription medications, over-the-counter medications, vitamins, and supplements so that the doctor can review them.
3. What Warning Signs Require Prompt Medical Attention?
In older adults, newly developed constipation or a significant change from previous bowel habits should be carefully evaluated. In particular, doctors need to consider and rule out malignant gastrointestinal conditions, especially colorectal cancer, when one or more of the following “warning signs” are present:
- Newly developed constipation or a significant change in bowel habits
- Narrow or flattened stools
- Blood in the stool or rectal bleeding
- Unintentional weight loss
- Prolonged loss of appetite
- Newly developed anemia
- Fever of unknown cause
- Persistent constipation that does not respond to usual treatment
- An abnormal mass felt in the abdomen
- Rectal prolapse or abnormalities in the anorectal region
- A personal or family history of gastrointestinal cancer
These symptoms do not necessarily mean that the person has cancer, but they are reasons to seek medical attention promptly rather than using laxatives on their own for a prolonged period. Depending on the case, the doctor may perform an abdominal examination, digital rectal examination, blood tests, colonoscopy, or appropriate imaging studies.
When is emergency medical attention needed? Seek emergency medical care if constipation is accompanied by severe abdominal pain, significant abdominal distension, vomiting, inability to pass gas, high fever, or worsening general condition.
4. What Complications Can Prolonged Constipation Cause?
Prolonged constipation can cause hemorrhoids, anal fissures, bleeding, painful bowel movements, urinary retention, or fecal incontinence. Stool may become impacted into a large mass in the rectum, known as fecal impaction.
Sometimes, a person may experience watery diarrhea or leakage of stool around a hard stool mass. This can easily be mistaken for ordinary diarrhea. Do not self-medicate with antidiarrheal drugs if fecal impaction is suspected, as this may worsen the condition.
5. How Should Constipation Be Managed Daily?
Daily care involves four measures: increasing dietary fiber, drinking enough water, engaging in appropriate physical activity, and establishing regular bowel habits. All four should be adjusted according to each person’s underlying medical conditions.
5.1. Increase Dietary Fiber
Gradually increase the intake of green vegetables, legumes, oats, potatoes, fruits, and whole grains. Increasing fiber too quickly may cause bloating and abdominal pain.
Fiber or fiber supplements are only appropriate when the person can drink enough water and does not have fecal impaction, intestinal obstruction, or severe difficulty swallowing.
5.2. Drink Enough Water
Adequate water intake helps soften stools, especially when increasing fiber intake. However, people with heart failure, kidney failure, cirrhosis, or those who have been instructed by a doctor to restrict fluids should not increase their water intake on their own. Fluid intake should be individualized according to the underlying medical condition.
5.3. Engage in Appropriate Physical Activity
Walking, chair-based exercises, or exercises appropriate for the person’s balance and physical ability are encouraged. For people who are bedridden for prolonged periods, caregivers can assist with repositioning and limb exercises as instructed by rehabilitation professionals.
5.4. Establish Regular Bowel Habits
Try to use the toilet at a regular time, usually in the morning or after a meal. Do not delay when there is an urge to have a bowel movement. A low footstool can be placed under the feet so that the knees are higher than the hips, helping facilitate a more favorable bowel movement position. Avoid sitting on the toilet for too long or straining excessively.
6. How Can Laxatives Be Used Safely?
If lifestyle modifications are not sufficient, a doctor may select medications based on stool characteristics, the cause of constipation, underlying medical conditions, ability to drink water, and the medications the person is currently taking.
| Medication Group | Mechanism and Onset of Action | Considerations for Older Adults |
|---|---|---|
| Osmotic laxatives | Help retain water in the intestine, soften stools, and usually take effect after 24–48 hours | Generally not absorbed into the bloodstream, and therefore are generally well tolerated and effective in older adults when used as directed. Possible side effects include bloating, abdominal cramps, or diarrhea |
| Stimulant laxatives | May be used when osmotic laxatives are not sufficiently effective | May cause abdominal pain, diarrhea, and sudden urgency to have a bowel movement, so caution is needed in people who have difficulty walking or are at risk of falls |
| Suppositories or enemas | Delivered directly into the rectum | Should only be used under the guidance of healthcare professionals, especially in cases of fecal impaction. Frequent self-administered enemas or manual removal of stool at home should be avoided |
Do not combine multiple types of laxatives, increase the dose, or use enemas for prolonged periods without a doctor’s indication and monitoring. Improper use may cause diarrhea, dehydration, electrolyte disturbances, and increase the risk of falls in older adults.
7. Key Takeaways
In older adults, newly developed constipation or constipation accompanied by warning signs requires prompt medical evaluation to rule out cancer and other serious medical conditions. Effective management often requires a combination of dietary modifications, physical activity, bowel habits, medications prescribed by a doctor, and regular monitoring. Do not use or adjust medications on your own.
8. Frequently Asked Questions
- Does not having a bowel movement every day mean that I am constipated? Not necessarily. A person who has bowel movements about three times a week but passes soft stools easily and without discomfort may still be considered normal. Conversely, a person who has daily bowel movements may still be constipated if they frequently need to strain or have very hard stools.
- Why do I have watery stools when I am constipated? This may be stool leakage around a hard stool mass impacted in the rectum, which can easily be mistaken for ordinary diarrhea. Do not self-medicate with antidiarrheal drugs if fecal impaction is suspected, as this may worsen the condition.
- When is constipation an emergency? Seek emergency medical care if constipation is accompanied by severe abdominal pain, significant abdominal distension, vomiting, inability to pass gas, high fever, or worsening general condition.
- Who should not increase fiber intake on their own? Fiber or fiber supplements are only appropriate when the person can drink enough water and does not have fecal impaction, intestinal obstruction, or severe difficulty swallowing. In addition, fiber intake should be increased gradually because increasing it too quickly may cause bloating and abdominal pain.
- Should people with heart failure or kidney failure drink more water to treat constipation? They should not increase their water intake on their own. People with heart failure, kidney failure, cirrhosis, or those who have been instructed by a doctor to restrict fluids should have their fluid intake individualized according to their underlying medical condition rather than following recommendations to drink more water intended for healthy individuals.
This content was developed by University Medical Center Ho Chi Minh City, with the support of Abbott Vietnam (VN-26-5441).
The information above is for reference purposes only and is not intended as medical advice. Please contact your doctor for detailed medical consultation.