Tips for Navigating Changes to Bowel Habits Post-Treatment

Your gut can cop a beating during bowel cancer treatment. Between surgeries, chemo, radiation, and whatever weird side effects your body throws into the mix, it’s no surprise your toilet habits might look very different by the end of it all.

This blog isn’t about glamorising that. It’s just about helping you manage it. Whether you’re dealing with diarrhoea, constipation, urgency, pain, or straight-up unpredictability, here are some practical tips to get a bit more control back.

Why Bowel Habits Change After Treatment

There’s no single reason your bowel habits shift and it’s not always just one thing causing issues. Post-treatment gut changes can come from:

• Surgery – especially if part of your bowel has been removed
• Radiation – which can inflame or damage bowel tissue
• Chemotherapy – which affects your gut lining, nerves, and appetite
• Medications – including antibiotics, pain relief, and anti-nausea drugs

Some of the most common changes include:

• Diarrhoea
• Constipation
• Increased urgency
• Going more frequently (or not often enough)
• Cramping and bloating
• Flatulence or pain with gas
• Mucus or bleeding
• Food sensitivities
• Unpredictable timing or incomplete emptying

Some people swing between extremes. Others get stuck with one persistent issue. The goal isn’t always to get back to what your bowel was like before cancer, it’s to find your new normal and learn how to live well with it.

Step 1 – Get to Know Your New Normal

Your gut is yours. There’s no universal standard for how many times you “should” go, or what your stool “should” look like post-treatment. It varies wildly person to person.

Try tracking your symptoms for a few weeks. Nothing fancy, a simple food/symptom diary can help you spot patterns over time. You might notice:

• Certain foods that trigger symptoms
• Times of day that are worse
• Stress or medication making it flare
• That it’s completely random (which is still a helpful realisation)

This is about learning your gut’s new language. Once you understand its moods, you can start working with it, not against it.

Step 2 – Trial & Error is Your New Best Friend

There’s no magic diet for post-cancer gut issues. But there are common triggers worth testing. These include:

• Fatty or greasy foods
• Alcohol
• Caffeine (especially coffee)
• Spicy food
• Artificial sweeteners (like sorbitol or mannitol)

Some people with diarrhoea do better on low insoluble fibre (avoiding things like seeds, skins, and raw veg). Others with constipation benefit from more soluble fibre (like oats, bananas, psyllium).

But don’t change everything at once. Introduce one thing at a time. Start small. And give it a few days before judging the result. Your gut might surprise you.

Step 3 – Routine is Everything

Your bowel loves routine. Whether it’s food, hydration, sleep, or movement, stability helps settle your system. Try to:

• Eat meals at regular times
• Drink water consistently throughout the day
• Go for a short walk (especially after meals)
• Establish a toilet routine, like sitting on the loo 20 mins after breakfast

If you’ve got a social event or appointment coming up, plan ahead. Maybe eat a safe meal the night before. Give yourself extra time in the morning. It’s not paranoia, it’s preparation.

Step 4 – Don’t Be a Hero: Use Medication

Sometimes your gut just needs help. Over-the-counter and prescribed options can make a huge difference:

• Loperamide (Imodium) for diarrhoea – take regularly, not just reactively
• Osmotic laxatives (like Movicol or OsmoLax) for constipation – gentle and non-stimulant
• Fibre supplements (e.g. psyllium husk) – helpful if your fibre intake is low
• Antispasmodics (like Buscopan) – if cramping is an issue

Always check with your GP or specialist before starting something new, especially if you’re still on treatment. But don’t suffer unnecessarily just because you think you “should be fine.”

Step 5 – Plan for Emergencies

If your bowel is unpredictable, preparation is key. Here’s what helps:

• Carry a small “go bag” baby wipes, spare undies, deodoriser spray, plastic bag
• Download the National Public Toilet Map
• Purchase a Toilet Card from Invisible Disabilities Australia
• Time your meals to avoid triggering symptoms before outings
• Know where toilets are if you’re travelling, petrol stations, shopping centres, etc

It’s not about being paranoid. It’s about buying yourself peace of mind.

Step 6 – Get Professional Help When You Need It

If things still aren’t improving, don’t go it alone. Help exists, you just need to know where to look:

• Accredited dietitian – to help with fibre balance, intolerances, and nutrition
• Stomal therapy nurse – even if you no longer have a stoma
• Pelvic floor physiotherapist – if you’re dealing with urgency, leakage or pain
• GP referral – to rule out infections or inflammatory issues

It’s okay to say, “I’m struggling with my bowel habits.” You’re not being dramatic. You’re being realistic, and that’s how things get better.

Final Thought

Your gut might never go back to how it was before cancer but that doesn’t mean you have to just suffer through it either. There is a new normal to be found. It just takes time, trial, and probably a few emergency dashes to the loo before you get there.