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Stay Hydrated with an Ostomy

Updated: Sep 3


Living with an ostomy changes many things- and hydration is one of them. We spoke to Jill, one of our stoma care nurses, to better understand how staying can help people with a stoma feel more comfortable, energetic, and in control.


In this article, she shares practical tips and signs to look out for, plus how to spot when your body might be running low on fluids.


Woman relaxing indoors and drinking water from a glass bottle, representing the importance of staying hydrated with an ostomy for overall wellbeing.
Staying hydrated with an ostomy supports better energy, comfort, and daily health.

Why hydration matters when living with an ostomy

"We often underestimate the role of water in our bodies, especially when living with an ostomy," says Jill, who's supported hundreds of patients through their stoma journeys.

If your large intestine has been partially or fully removed, your ability to absorb water may be reduced.


Around 20-30% of our water absorption usually happens in the large intestine - so it's not just about drinking more, but understanding how your body handles it.



How much should I drink?

According to the Ostomy Nutrition Guide from the University of Rochester Medical Center, most people with an ostomy should aim for at least 8 cups of fluid daily. That amount can change depending on:


  • How much output are you're passing

  • The weather (hot days need more!)

  • Your activity level



Spot the signs of dehydration early

One of the most important things Jill highlighted was recognising dehydration before it becomes serious. Keep an eye out for:


  • Headaches

  • Dizziness or light-headedness

  • Fatigue

  • Dark Urine

  • Dry Mouth


"Muscle cramps or a racing heart can be signs your body's struggling to keep up," she explains." Act early- top up your fluids and rest if needed."


Not sure if you’re drinking enough or want to learn more about our support? Our team can explain how the service works and what’s included.





What causes dehydration with a stoma?

There are lots of potential causes, including:


  • Not drinking enough throughout the day

  • Vomiting or diarrhoea

  • Hot weather or exercise

  • Medications that act as diuretics

  • Foods or drinks that increase output(like caffeine or alcohol)



Easy ways to stay hydrated

She also gave us her top strategies for supporting hydration with an ostomy:


  • Sip fluids slowly and regularly - especially between meals.

  • Add electrolytes- sodium and potassium help your body retain fluids

  • Include salty snacks- things like crackers or pretzels can help

  • Limit fluid during meals- to avoid diluting digestive enzymes



What to avoid with an ostomy

Some foods and drinks can cause unpredictable side effects or irritation.

These may include:


  • Sweets and artificial sweeteners

  • Alcohol and caffeine

  • Frizzy drinks

  • Dairy (if you're sensitive to lactose)

  • Nuts, seeds, and high-fibre veg

  • Whole grains like bran or popcorn

  • Legumes, beans, and lentils


Everyone's different, so tracking how your body reacts can really help.


A simple way to track your fluid intake

Ready to feel more confident with your hydration and stoma care? With discreet NHS prescription deliveries, complementary items like the Hydration Tracker, and caring support, getting started is simple.





Frequently Asked Questions: About Hydration and Ostomy Care


1. Why is hydration important for people with an ostomy?

Staying hydrated helps prevent dehydration, which can happen more quickly after stoma surgery, especially with an ileostomy, where fluid loss is higher.


2. How much water should I drink daily with an ostomy?

Aim for at least 8–10 cups (around 2 litres) of fluids daily, unless your doctor advises otherwise, to keep your body and stoma functioning well.


3. Are there signs of dehydration I should watch for?

Yes, dry mouth, dark urine, dizziness, or fatigue can all be signs you're not drinking enough fluids with an ostomy.


4. Can I drink other fluids besides water?

Yes, oral rehydration drinks, herbal teas, and clear soups are good options. Avoid too much caffeine or alcohol, as they can dehydrate you.


5. Does the type of ostomy affect hydration needs?

Yes, people with an ileostomy usually lose more fluids and electrolytes, so they may need extra hydration compared to those with a colostomy or urostomy.


Stay informed and supported on your ostomy journey. Browse more helpful reads in our Ostomy Care category

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