A person clutching their CF belly, which has an angry face on it.

Understanding and Coping with CF Belly

When we have a gut flare-up, many dieticians feel our digestive enzymes are the culprit. Adjustment to quantities, missed doses, inadequate amounts, and so on. I found it extremely challenging trying to understand why I was having such severe CF belly symptoms. I completed un-ending Creon diaries and took regular laxatives, but I still couldn't poop for days.

What is CF belly?

A large percentage of CF people have insufficient pancreatic enzymes because the pancreas is inflamed and blocked just like the lungs. Many patients are prone to late gastric emptying, GERD, SIBO, DIOS, and slow gut transit. These conditions can mask each other. This just piles onto the poop problem.1

Symptoms of CF belly are:1

  • Constipation
  • Bloating
  • Overflow of watery feces
  • Loss of appetite
  • Nausea
  • Fullness
  • Pain in the tummy
  • Acid reflux
  • Diarrhea

How I manage my CF belly

When I am having a flare-up, I concentrate on getting my Creon dosing right with every meal--including those hidden fats we often forget about. I increase my laxatives and add in some linseeds to get things moving. I started taking a high grade probiotic a few years back and realized that was a key part of this poop puzzle.

Having foods like soups and easily digestible meals really help when my appetite drops or the fullness and nausea kick in. Eating small meals little and often helps as well as really taking my time to chew my food. Sounds simple, but often we forget how important chewing is to help kick start our digestive system.

Hot water bottles are a must, as are painkillers, rest, and plenty of water during a bad flare. Hydration is key, especially if using laxatives or linseeds as they can often make me feel dehydrated. Hot baths or gentle stretches help ease the discomfort, too.

I always hit up my team and let them know what's going on with my belly, especially if I think it may be the start of a bout of DIOS. My attitude is: nip it in the bud and save yourself the agony.

Lastly, looking and feeling 6 months pregnant with a bloat baby is never fun. Over the years, I have adapted my wardrobe to incorporate some "bloat-friendly" items with elasticated waists. This really helps when I am feeling uncomfortable about my CF belly.

Other things to consider

Side effects to drugs

Many drugs that we need to use in CF care such as anti-sickness, painkillers, and calcium can all cause constipation. Antibiotics are popular culprits for bacterial overgrowth and loose stools.2 Recently, Trikafta has been known to trigger severe gut symptoms, pain, and bloating.3


CF doctors focus heavily on avoiding a build-up of crap (quite literally) with laxatives and very little with probiotics. They fail to encompass a fully holistic approach to gut health. A good probiotic can help with bacterial overgrowth, reflux, and regulating stools.4 A MUST HAVE when using antibiotics.

High FODMAP foods

These complex carbohydrates can sometimes be a trigger for CF patients with complex digestive issues. High FODMAP foods are a common trigger for IBS sufferers.5 There is limited data on FODMAPS and CF but, some patients have seen improvements.

Do you or your loved one with CF experience "CF belly"? Share your experience with us!

By providing your email address, you are agreeing to our privacy policy.

This article represents the opinions, thoughts, and experiences of the author; none of this content has been paid for by any advertiser. The Cystic-Fibrosis.com team does not recommend or endorse any products or treatments discussed herein. Learn more about how we maintain editorial integrity here.

Join the conversation

Please read our rules before commenting.