Introduction
Constipation is an extremely common issue in older adults – approximately one-third of people over 60 years old are affected, and more than half of nursing home residents struggle with it. Beyond discomfort, constipation can have serious consequences. In frail seniors, excessive straining on the toilet may trigger fainting or even cardiac ischemia, and severe cases can lead to complications like stercoral ulceration (where hard impacted stool causes pressure sores in the colon, risking perforation). As a geriatrician with years of experience, I have seen how chronic constipation can impair quality of life and how dangerous it can become if neglected. In this blog, I’ll share insights on why constipation is so prevalent in the elderly, how we manage it following British guidelines, and a few real-case examples – including an emergency where prompt intervention averted a life-threatening situation. The aim is to educate both fellow clinicians and caregivers or seniors themselves on managing this common yet often underestimated problem.
Understanding the Problem in Older Adults
What is constipation? In simple terms, constipation refers to bowel movements that are infrequent or difficult to pass. Stools are often hard, dry, and may be accompanied by a feeling of incomplete evacuation. Many people think you must have a bowel movement every day, but in fact there is no physiological necessity for daily bowel action. Normal frequency varies from person to person; for some older adults, going 2-3 times per week can be perfectly normal – as long as the stool is soft and passing without undue straining.
Why are the elderly more prone to constipation? Constipation tends to increase with age due to a combination of factors. Older people are more likely to have diets low in fiber (for example, eating less fruits/vegetables due to reduced appetite or poor dentition) and may not drink enough fluids, leading to harder stools. Mobility often decreases with age – seniors who are less active or bedridden have slower gut transit. Many are on multiple medications (polypharmacy), and several common drugs can cause or worsen constipation. These include opioid painkillers (codeine, morphine), certain blood pressure pills like calcium-channel blockers, iron supplements, antacid therapies, and medications with anticholinergic effects such as some antidepressants or Parkinson’s disease drugs. Chronic medical conditions can play a role too: an underactive thyroid, high calcium levels, Parkinson’s disease, diabetes, stroke, or even early colorectal cancer can all lead to secondary constipation. Psychosocial issues like depression or dementia (where a person may ignore the urge or have toileting difficulties) further contribute. In hospital or care home settings, we also see factors like lack of privacy or having to use a bedpan hindering proper toileting. In short, constipation in the elderly is usually multifactorial – a combination of age-related changes, lifestyle, and medical factors.
Impact on health: Aside from uncomfortable symptoms (bloating, abdominal pain, hard stools, straining), chronic constipation can significantly reduce an older person’s quality of life. It may cause loss of appetite, lethargy, and generally make people feel unwell. Importantly, severe constipation can present in atypical ways in seniors. For instance, an elderly person with confusion or delirium might actually be suffering from fecal impaction – in one hospital study, constipation was found to be a contributor to delirium in about 11% of older inpatients and even caused urinary retention in 5%. I’ve seen cases where resolving the constipation dramatically improved a patient’s alertness and comfort. This underlines why healthcare providers should always assess bowel habits in older patients, especially if there is a sudden change in mental or physical health.
Warning signs (“red flags”): Whether you are a clinician or a concerned family member, it’s crucial to recognize when constipation might be a sign of something more serious. Red flag symptoms that warrant prompt medical evaluation include:
- A marked, unexplained change in bowel habits (new-onset constipation or alternating with diarrhea out of the blue).
- Any rectal bleeding that isn’t obviously from hemorrhoids (especially if blood is mixed with stool).
- Persistent abdominal mass or new lump felt in the tummy.
- Narrowed stool caliber (pencil-thin stools).
- Unintended weight loss, iron-deficiency anemia, fever or generally feeling unwell.
- Family history of colon cancer or inflammatory bowel disease in a patient with new constipation.
- Severe constipation not responding to treatment.
Such features could indicate an underlying colorectal cancer or other serious bowel disease. In line with NICE guidelines (NG12 in the UK), any older patient with suspicion of colon cancer should be referred urgently for further tests (often on a two-week cancer pathway). Fortunately, these are the minority of cases – most constipation in the elderly is benign and manageable – but vigilance is key.
Case Study: A Chronic Constipation Turnaround
To illustrate a typical scenario, let me share the story of Mrs. Edith, an 82-year-old retired teacher who came to my geriatric clinic with a long history of constipation. Edith lived alone and admitted she had been “bunged up” for years, relying on weekly doses of a stimulant laxative (senna) to force a bowel movement. Recently, her problem was worsening – she felt bloated, lost her appetite, and was only passing hard, pellety stool twice a week with much straining. She was worried and uncomfortable.
On reviewing her case, several factors stood out. She had a habit of tea and toast for meals (low fiber intake), limited fluids (to avoid needing the loo at night), and painful arthritis in her knees which curtailed exercise. Her medications included calcium supplements and codeine for back pain – both notorious for causing constipation. On examination, her abdomen was soft but I could feel hard stool in the lower colon, and a rectal exam confirmed a lot of stool present but no masses or bleeding. There were no red flags suggesting cancer; this was a case of chronic idiopathic (functional) constipation likely exacerbated by lifestyle and medications.
Management plan for Edith: We approached Edith’s constipation on two fronts – lifestyle modifications and judicious use of laxatives – following the stepwise strategy recommended by British guidelines:
- Lifestyle changes: I educated Edith that having a bowel movement every day isn’t necessary as long as she’s comfortable. We worked on diet first. Gradually, she increased her fiber intake – adding porridge or high-fiber cereal at breakfast, an extra piece of fruit (she discovered she quite likes prunes!), and more vegetables with meals. We discussed the importance of drinking enough fluids; she made an effort to drink water or herbal tea throughout the day to reach about 1.5–2 liters, as her heart and kidneys were healthy. I also encouraged gentle exercise – even a short daily walk or some chair exercises – to stimulate her digestion. Another useful tip was establishing a toilet routine: I advised her to sit on the toilet for a few minutes every morning after breakfast, taking advantage of the colon’s natural reflex after meals. Using a small footstool to elevate her feet and leaning forward (mimicking a squatting posture) can straighten the rectum and help stool pass more easily – she found this “modified squat” posture quite helpful. Importantly, we also reviewed her medications: I liaised with her GP to reduce her codeine use (switching to paracetamol and physiotherapy for her back pain) and to ensure calcium supplements were truly needed at the dose given – anything that could be deprescribed or swapped to a less constipating alternative, we adjusted.
- Laxatives (medical treatment): Despite improvements, lifestyle measures alone are often not enough for chronic constipation in the elderly. According to NICE guidance, the first-line laxatives for short-term constipation are usually bulk-forming fiber supplements like ispaghula husk (psyllium). However, these require adequate fluid intake to work well and can cause bloating. Given Edith’s already hard stools and long-standing issues, we opted to start with an osmotic laxative – in her case, polyethylene glycol (a macrogol powder) – which works by drawing water into the bowel to soften stool. After a week on a daily macrogol sachet, her stool consistency improved considerably. She was now stooling every other day with less straining. To further help her establish regularity, I added a gentle stimulant laxative (senna tablets at night, in a low dose) to stimulate the bowels if needed. Over about one month, Edith’s bowels “woke up” – she developed a routine of going every morning or second morning with soft, formed stools. Once she was consistently achieving at least three comfortable bowel movements per week, we discussed tapering off the laxatives. Abruptly stopping can cause rebound constipation, so we gradually reduced the senna and then the macrogol. With her new diet and habits, she was able to maintain regular bowel function on minimal medication. Edith reported feeling more energetic, her appetite returned, and she no longer dreaded the toilet.
This case highlights the cornerstone of managing chronic constipation: start with lifestyle and address reversible factors, then use laxatives in a stepwise manner. Often a combination of agents is used (e.g. an osmotic to soften plus a stimulant to prompt bowel action), tailored to the patient’s response. It’s also crucial to prevent constipation proactively. For any older patient starting an opioid painkiller, I always prescribe a concurrent laxative regimen (typically a stool softener or osmotic and a stimulant) – in line with NHS recommendations to always offer laxatives when using opioids. This pre-empts the near-inevitable constipation that opioids cause.
Management Strategies and Guidelines
Lifestyle and toileting measures
- Start with everyday habits: build a diet rich in fruit, vegetables and whole‑grains, introducing fibre gradually (aim for roughly 30 g daily) to limit bloating.
- Encourage adequate fluid intake, as even mild dehydration can harden stools.
- Promote regular physical activity suited to the person’s mobility; movement helps keep the gut moving.
- Establish an unhurried, private toilet routine—ideally after meals or first thing in the morning, when the bowel is naturally more active.
- A footstool that raises the knees above hip level (mimicking a squat) and responding promptly to the urge to defecate both aid easier evacuation.
- Review current prescriptions for drugs that slow the bowel (e.g., opioids, certain calcium‑channel blockers, anticholinergics) and stop or substitute them wherever possible.
Laxatives: a stepwise approach
- If lifestyle adjustments are insufficient, introduce an oral laxative.
- For short‑term or milder cases, begin with a bulk‑forming agent such as ispaghula husk, but remind patients to drink plenty of water.
- When stools remain hard or infrequent, switch to—or add—an osmotic laxative (e.g., lactulose or macrogol). These draw water into the bowel; allow two to three days for full effect.
- If softness improves yet emptying is still difficult or incomplete, add a stimulant laxative such as senna or bisacodyl to trigger colonic contractions.
- Titrate doses so the person passes a soft, formed stool at least three times weekly with minimal straining. Once this pattern is stable, taper and stop laxatives gradually to check whether regularity can be maintained without them.
When first‑line steps fail
- Persistent constipation despite optimal use of a bulk‑former, an osmotic and (if needed) a stimulant calls for re‑evaluation and specialist input.
- Further investigations might include colon imaging, anorectal physiology testing or screening for underlying disorders.
- Advanced pharmacological options include prokinetics such as prucalopride (recommended for women with chronic constipation unresponsive to at least two laxative classes) and secretagogues such as lubiprostone or linaclotide, particularly where irritable bowel syndrome with constipation is suspected.
- Biofeedback therapy can help if pelvic‑floor dysfunction impedes emptying.
- Above all, avoid leaving an older patient on an ever‑expanding list of laxatives without improvement—timely referral prevents prolonged discomfort and uncovers treatable causes.
Reference list
National Institute for Health and Care Excellence (NICE) (2022) Constipation. Clinical Knowledge Summary. London: NICE. Available at: https://cks.nice.org.uk/topics/constipation/ (Accessed: 19 July 2025).
Medway and Swale Medicines Optimisation Team (2023) Constipation: adult laxative guidance. Medway & Swale Formulary. Available at: https://medwayswaleformulary.co.uk (Accessed: 19 July 2025).
Hull and East Riding Prescribing Committee (2019) Management of Constipation in Adults. Updated May 2019. Hull: Hull and East Riding Prescribing Committee. Available at: https://www.hey.nhs.uk/wp/wp-content/uploads/2019/08/GUIDELINE-Constipation-guidelines-updated-may-19.pdf (Accessed: 19 July 2025).