Bloating is one of the most common digestive complaints I see in my nutrition practice. It can also be one of the most frustrating.
Sometimes we find an obvious explanation. We treat a gut imbalance, improve constipation, identify a food trigger, and the bloating gets significantly better.
But sometimes it doesn’t.
You may have treated your SIBO or dysbiosis. You may have given up gluten or dairy. You may have tried a low FODMAP diet, probiotics, digestive enzymes and all kinds of gut-supportive supplements.
And yet, you are still bloated.
When this happens, it can be tempting to assume that the SIBO is still there, that another food needs to be eliminated, or that something else is “wrong” with your microbiome.
But bloating is more complicated than that.
There are many different reasons we experience bloating, and understanding your particular pattern can help us figure out what may actually be driving your symptoms and, most importantly, what might help.
What Do You Mean by “Bloated?”
We tend to use the word “bloating” to describe two slightly different things.
- Bloating is the feeling of abdominal fullness, pressure or tightness.
- Distension is a visible increase in the size of your abdomen.
You can have one without the other, or both at the same time.
This distinction is important because neither feeling bloated nor having visible abdominal distension necessarily means that you have an excessive amount of intestinal gas.
A Few Questions to Ask Yourself
Before trying to figure out what is causing your bloating, think about your typical pattern:
- Does your abdomen physically get larger, or does it mainly feel full, tight or pressured?
- Is your stomach relatively flat when you wake up and more distended by the end of the day?
- Does bloating begin during or immediately after eating, or several hours later?
- Is the bloating mostly in your upper abdomen, lower abdomen or everywhere?
- Does passing gas or having a good bowel movement improve it?
- Do you strain, have hard stools or frequently feel that you haven’t completely emptied your bowels, even if you have a bowel movement every day?
- Do particular foods consistently make it worse?
- Do you experience early fullness, nausea, reflux, frequent belching or the sensation that food sits in your stomach?
- Does your bloating change during times of increased stress?
- If you menstruate, does your bloating change predictably throughout your cycle?
Your answers can provide some very useful clues.
10 Reasons You May Still Be Bloated
1. Too Much Fermentation
Sometimes bloating really is related to increased intestinal gas.
SIBO, intestinal methanogen overgrowth (IMO), carbohydrate malabsorption and changes in the intestinal microbiome can all increase fermentation and gas production.
In these situations, bloating may occur along with increased gas, changes in bowel movements and symptoms that worsen after eating certain carbohydrates.
What may help
Depending on the situation, treatment may include addressing SIBO or IMO, improving bowel regularity and motility, and temporarily modifying highly fermentable foods.
But if you’ve already treated SIBO and your bloating hasn’t significantly improved, it may be time to consider whether something other than excessive fermentation is contributing to your symptoms.
2. Food Intolerances & Fermentable Carbohydrates
Certain carbohydrates are poorly absorbed or rapidly fermented in the digestive tract. These are often referred to collectively as FODMAPs, and different people can be sensitive to different categories.
Some common examples include:
- Lactose: milk, ice cream, soft cheeses and some yogurts
- Fructose: honey, apples, pears, mango and foods or beverages containing high-fructose corn syrup
- Fructans: wheat, rye, onions, garlic, leeks and asparagus
- Galacto-oligosaccharides (GOS): beans, lentils, chickpeas and some nuts
- Polyols: stone fruits such as peaches and plums, mushrooms, cauliflower, avocado, and sweeteners such as sorbitol, mannitol and xylitol
This doesn’t mean all of these foods are “bad” or that everyone with bloating should avoid them. In fact, many high-FODMAP foods are incredibly nutritious and provide important fibers and prebiotics that support a healthy gut microbiome.
What may help
Rather than eliminating more and more foods indefinitely, the goal is to identify your specific triggers and your individual tolerance. A short-term elimination followed by careful reintroduction can sometimes help clarify which foods or FODMAP categories are actually problematic.
Whenever possible, the long-term goal should be to eat the most varied diet that you comfortably can.
3. Constipation or Incomplete Evacuation
You don’t have to go for several days without a bowel movement to be constipated.
You can have a bowel movement every day and still retain stool or have difficulty completely emptying your bowels. This can contribute to abdominal pressure, increased fermentation and difficulty moving gas through the digestive tract.
What may help
Depending on your individual needs, helpful strategies may include:
- Adequate hydration
- Appropriate amounts and types of fiber
- Regular movement
- Establishing consistent bathroom habits
- Supporting healthy intestinal motility
More fiber isn’t always better. If increasing fiber consistently makes your bloating worse, that is useful information. Sometimes we need to work on moving things through and out before simply adding more bulk.
4. Difficulty Relaxing the Pelvic Floor
Having a bowel movement requires coordination between several muscles. Some muscles need to contract while others need to relax.
Sometimes that coordination doesn’t happen properly. This is known as pelvic floor dyssynergia, and it can make it difficult to completely evacuate stool and gas.
Clues can include straining, spending a long time on the toilet, feeling that you haven’t completely emptied, feeling “blocked,” or having constipation that doesn’t improve as expected with typical dietary strategies.
What may help
A pelvic floor physical therapist can evaluate how these muscles are functioning. Specialized biofeedback therapy can also be very helpful for some people.
Sometimes recognizing that the problem is with evacuation rather than what you’re eating completely changes the treatment approach.
5. Abdominophrenic Dyssynergia (APD)
This is a fascinating and often overlooked cause of visible abdominal distension.
Normally, your diaphragm and abdominal muscles coordinate as your digestive tract fills throughout the day.
In some people, this coordination becomes altered. The diaphragm moves downward while the abdominal wall relaxes, pushing the abdominal contents forward.
The result can be significant visible distension without an unusually large amount of intestinal gas.
A classic pattern is: relatively flat stomach in the morning → increasing distension after meals → dramatically larger abdomen by evening.
If you’ve ever said, “I wake up with a flat stomach and by dinner I look pregnant with a bloat-baby,” this is something worth considering.
What may help
Treatment focuses less on eliminating foods and more on helping retrain the body’s muscular and nervous system response.
Diaphragmatic breathing and other behavioral retraining strategies may be helpful. Specialized biofeedback approaches are also being studied and used for APD.
This is another situation where continuing to restrict your diet or repeatedly treating intestinal bacteria may not address the actual problem.
6. A Hypersensitive Gut
Sometimes the issue isn’t how much gas or food is inside your digestive tract. It’s how strongly your nervous system perceives normal stretching and pressure.
This is called visceral hypersensitivity, and it is common in IBS and other disorders of gut-brain interaction.
A normal amount of intestinal gas or stretching that another person barely notices may feel extremely uncomfortable to someone with a more sensitive digestive system.
What may help
Strategies that work directly with communication between the gut and nervous system can be very helpful. These may include:
- Gut-directed hypnotherapy
- IBS-focused cognitive behavioral therapy
- Diaphragmatic breathing
- Meditation and relaxation practices
- Gentle movement and yoga
- Gradually expanding an overly restricted diet when appropriate
Your nervous system is an important part of your digestive system. It directly influences sensation, motility and the way your digestive muscles respond.
7. Stomach Function & Digestion
Not all bloating originates in the intestines.
If your bloating occurs primarily in the upper abdomen and is accompanied by early fullness, nausea, frequent belching, reflux or the feeling that food sits in your stomach for a long time, the stomach itself may deserve more attention.
Problems with how the stomach accommodates a meal, how quickly it empties and how sensitive it is to stretching can all contribute to bloating.
What may help
Some people feel better eating smaller meals and avoiding overly large, higher-fat or higher-fiber meals.
Persistent symptoms may warrant further evaluation for conditions such as functional dyspepsia or delayed gastric emptying.
8. Swallowed Air & Belching
Sometimes air is contributing to the problem, but it isn’t necessarily being produced by intestinal bacteria.
Eating or drinking quickly, chewing gum, drinking carbonated beverages and using straws can all increase the amount of air you swallow. That air can contribute to belching, abdominal pressure and bloating.
What may help
Simple changes can make a difference:
- Slow down while eating
- Chew your food thoroughly
- Avoid gulping liquids
- Reduce carbonated beverages
- Limit gum if you chew it frequently
- Practice relaxed diaphragmatic breathing
Paying attention to how you eat and drink can sometimes be just as important as paying attention to what you’re eating.
9. The Gut-Brain Connection
I talk about the gut-brain connection a lot because the brain and digestive system truly do communicate constantly.
The nervous system can influence intestinal motility, stomach function, sensitivity to intestinal stretching, bowel movements and even how the diaphragm and abdominal muscles respond after eating.
This is why your bloating can become significantly worse during a stressful period even when nothing about your diet has changed.
What may help
Regularly incorporating practices that help shift your nervous system into a calmer state can complement nutrition and digestive treatment.
This might include:
- Meditation
- Yoga
- Diaphragmatic breathing
- Spending time outside
- Gut-directed hypnotherapy
- Finding small, consistent ways to slow down
The goal isn’t just to “reduce stress.” It’s to support healthier communication between your nervous system and digestive tract.
10. Hormonal Changes & Your Menstrual Cycle
If you menstruate, you may notice that your bloating predictably changes throughout your cycle.
Changes in estrogen and progesterone can affect fluid retention, intestinal motility and bowel habits. Some people notice more constipation and bloating in the days leading up to their period, while others experience looser stools or more digestive symptoms once their period begins.
Hormonal changes may also affect how sensitive the digestive tract is to stretching and pressure, which means you may feel more bloated even when there hasn’t been a dramatic change in what you’ve eaten.
This can become especially noticeable during perimenopause, when hormone levels can fluctuate more unpredictably.
What may help
Start by looking for a pattern. Tracking your bloating, bowel movements and menstrual cycle for a couple of months can help determine whether there is a predictable hormonal component.
Regular movement, adequate hydration, supporting regular bowel movements and being mindful of foods that you know are more difficult for you to digest may be especially helpful during times of the month when you’re more prone to bloating.
What Your Bloating Pattern May Tell Us
Sometimes the timing and characteristics of your bloating provide the best clues.
Lots of gas + bloating several hours after eating
Fermentation, SIBO, dysbiosis or intolerance to certain fermentable carbohydrates may be contributing.
Relatively flat in the morning + increasingly distended throughout the day
Constipation, difficulty evacuating stool and gas, or abdominophrenic dyssynergia may deserve more attention.
Significant bloated feeling + very little visible distension
Visceral hypersensitivity may be playing a larger role.
Upper abdominal fullness soon after eating + early satiety or nausea
Stomach function and functional dyspepsia may be worth considering.
Straining + incomplete evacuation + feeling better after a good bowel movement
Constipation or pelvic floor dysfunction may be contributing.
Bloating that changes dramatically during stressful periods
The gut-brain connection may be an important piece of the puzzle.
Bloating that predictably worsens before or during your period
Hormonal changes affecting fluid balance, motility, bowel habits and gut sensitivity may be contributing.
These are all clues that can help point us in a more useful direction.
Bloating Is a Symptom, Not a Diagnosis
As you can see, bloating can be related to fermentation and food intolerances, but it can also involve constipation, pelvic floor function, the stomach, abdominal muscle coordination, visceral sensitivity, hormonal changes and the gut-brain connection.
Often, more than one factor is involved.
Instead of continuing to chase the next food, supplement or gut bug, the more helpful question may be: “What is my bloating pattern telling me?”
Once we understand that, we have a much better chance of choosing strategies that actually address the problem.
I work with clients to identify the patterns and possible contributors behind ongoing digestive symptoms, and to create a personalized nutrition plan that supports better digestion without unnecessary food restriction. Learn more about our nutrition services and schedule an appointment with Debbie.
