Can Constipation Cause Bloating and Gas? How to Tell and What Helps

You have eaten pretty much as you normally do, but by evening your stomach feels full and uncomfortable. You also feel more gassy than usual, so you start going over everything you ate that day, wondering if something did not agree with you. But food is not always the reason. If you are wondering, can constipation cause bloating and gas? Yes, it can. Constipation can come with both bloating and extra gas, and you do not have to go several days without a bowel movement for constipation to be the problem. Hard or lumpy stools, straining when you go or feeling like you still need to go even after using the toilet can all be signs. So, before you start cutting foods out of your diet one by one, it might help to take a look at what has been happening with your bowel movements too. If the bloating and gas tend to show up around the same time that your stools become harder, less frequent or harder to pass, constipation could be part of the reason you are feeling uncomfortable.

Why Can Constipation Cause Bloating and Gas?

Constipation is not just about how often you go to the toilet. According to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), constipation can mean having fewer than three bowel movements a week, but it can also mean passing hard or dry stools, finding it difficult or painful to pass stool, or feeling like you have not completely emptied your bowels. Bloating and gas can happen alongside these symptoms too.

Gas itself is a normal part of digestion. Some of it comes from air you swallow while eating and drinking, while some is produced when bacteria in the large intestine break down carbohydrates that were not fully digested earlier in the digestive tract. When you are constipated, gas can become more noticeable. NIDDK lists functional constipation among digestive conditions that may affect how gas moves through the intestines or how strongly you experience bloating and abdominal discomfort. Johns Hopkins Medicine also identifies constipation as a factor that can show up as gas symptoms. That does not mean constipation is the culprit behind all the bloating or gas. But if you keep noticing the two together, it is worth paying attention to.

Can You Be Constipated If You Poop Every Day?

Yes, and this is one reason constipation can be easy to miss. You may still have a bowel movement every day but notice that your stools are hard, you have to strain to pass them or you still feel like there is more stool left afterwards. Those symptoms can still fit with constipation. So instead of asking only, ‘Did I have a bowel movement today?’, think about what the bowel movement was actually like. Was it easy to pass? Was the stool unusually hard? Did you feel light afterwards? Your usual pattern matters too. If you normally have comfortable bowel movements twice a day and suddenly start going once a day with harder stools, that can be a sign even though you are still going every day.

How Do I Know If My Bloating Is From Constipation?

There is no one sign that can tell you for sure that constipation is causing your bloating, but the timing of your symptoms can give you some clues. Constipation may be part of the problem if your bloating starts around the same time that your stools become harder, you have to strain more, you are going less often than usual or you often feel like you have not fully emptied your bowels. It can also be useful to notice what happens after you go to the toilet. If the pressure, fullness or bloated feeling eases after a comfortable bowel movement, your bowel habits may be contributing to the discomfort. Think about anything that has changed recently too. Travel, eating differently, being less active, ignoring the urge to go and starting certain medicines or supplements can all affect constipation. If your bowel movements are regular and comfortable but the bloating keeps happening, constipation may not be the main reason. Other causes may need to be considered.

For more on how the timing of bloating can offer useful clues, see Morning Bloating vs Evening Bloating: What the Pattern Means.

Gas, Bloating and Constipation: What’s Actually Happening

Not necessarily. It is easy to think of constipation as stool simply 'blocking' gas inside your intestine, but what you feel is a little more complicated than that. Your gut may produce a normal amount of gas, but how that gas moves through the intestines and how sensitive your digestive system is to it can affect how bloated or uncomfortable you feel. NIDDK notes that functional gastrointestinal conditions can affect how gas moves through the gut or make someone feel bloating or abdominal pain more strongly. Functional constipation is one of the conditions associated with these symptoms. So, constipation and gas can happen together but it does not mean that your body is producing a lot more gas.

Ways to Relieve Constipation, Bloating and Gas

If constipation seems to be part of what is causing your bloating or gas, start with a few simple changes rather than trying several remedies at once. Small changes to your food, fluids and daily routine can make bowel movements easier. Here are a few things you can follow:

• Increase Fibre Slowly: If you do not eat much fibre at the moment, adding more fruit, vegetables, whole grains, lentils, beans, nuts and seeds can help make your stools softer and easier to pass. But do not suddenly add a lot of fibre to your diet, especially if you are already dealing with gas or bloating. NIDDK recommends increasing fibre gradually rather than making a sudden big change. Adults generally need around 22 to 34 grams of fibre a day, depending on age and sex, but you do not need to go from eating very little fibre to that amount overnight. A slower increase gives your digestive system time to adjust and can make the change easier to tolerate.

• Drink Enough Fluids: Getting enough fluid is important when you are increasing your fibre intake because fluid allows fibre to work properly. You do not need to force yourself to drink huge amounts of water in one go. Having fluids regularly throughout the day is a much easier habit to maintain.

• Keep Your Body Moving: Regular physical activity may also make it easier to manage constipation. You do not need to start with a hard workout. A daily walk or simply staying active during the day can be a useful part of keeping your bowel movements regular.

• Do Not Ignore the Urge to Go: If you regularly put off going to the toilet when you feel the urge, it can contribute to constipation. It may also help to give yourself enough time and follow a regular toilet routine. NIDDK notes that doctors may recommend bowel training, which can include trying to have a bowel movement at around the same time each day.

If constipation keeps coming back or does not improve, though, these changes should not replace finding out why it is happening.

Could Your Medicine or Supplement Be Causing Constipation?

Sometimes, a change in your bowel habits can be linked to a medicine or supplement you have started taking. NIDDK lists several medicines and supplements that can contribute to constipation, including iron supplements, some calcium- or aluminium-containing antacids, opioid pain medicines and some medicines used for depression, among others. If you notice that your bowel movements and habits changed soon after starting a medicine or changing its dose, tell your doctor or pharmacist. The timing can be useful information when they are working out what may be causing the problem. Do not stop a prescribed medicine on your own because you think it may be causing constipation. It is safer to discuss the symptoms and timing with the healthcare professional who prescribed it.

Can Probiotics Help With Constipation and Bloating?

Probiotics are being studied for constipation, but that does not mean every probiotic will work in the same way or give the same results. A 2024 systematic review and meta-analysis of 10 studies involving more than 1,200 people found that probiotics improved some constipation-related outcomes compared with placebo. However, the studies were quite different from one another, and the authors called for larger and more robust trials.

The type of probiotic matters too. Different strains and formulations can have different effects, so it is better to look at the specific product rather than assume that every probiotic will work the same way. If you want a clearer explanation of why probiotics and prebiotics are not interchangeable, see Probiotics vs Prebiotics: What’s the Difference and Do You Need Both?.

If you are looking for an everyday probiotic and prebiotic supplement, Aora Gut-Guard contains the SNZ TriBac® probiotic blend along with FOS, a prebiotic ingredient. It is intended for everyday digestive wellness and is not a treatment for chronic constipation or another digestive condition. FOS is a fermentable prebiotic fibre, so some people may notice temporary gas or bloating when they first introduce it. Are Probiotic Supplements Safe? What to Know looks more closely at those early digestive changes and when they should not simply be dismissed as an adjustment. If constipation keeps coming back, though, finding out why it is happening is more important than simply adding another supplement.

When Bloating May Not Be From Constipation

Constipation is only one possible reason for bloating and gas. You may swallow more air while eating or drinking, drink more carbonated beverages or have trouble digesting certain carbohydrates. Irritable bowel syndrome and other digestive conditions can also cause these symptoms. NIDDK notes that conditions such as lactose intolerance, functional gastrointestinal disorders and small intestinal bacterial overgrowth can be linked with gas symptoms. This is why the pattern is worth paying attention to. If your constipation improves but the bloating continues, do not automatically assume that constipation is still the cause. There may be something else going on.

When Constipation Needs Medical Attention

Occasional constipation is common and often gets better with simple changes. But if it keeps coming back or is clearly different from your usual bowel pattern, it is worth speaking with a healthcare professional. NIDDK advises prompt medical assessment if constipation occurs with rectal bleeding or blood in the stool, constant abdominal pain, an inability to pass gas, vomiting, fever or unintentional weight loss. You should also speak with a healthcare professional if your constipation does not improve with self-care or keeps returning.

Look Beyond Your Last Meal

When your stomach feels bloated or you are passing more gas than usual, it is easy to blame the last thing you ate. Sometimes food is part of the reason. But if the bloating keeps appearing alongside hard stools, straining, incomplete bowel movements or a noticeable change in how often you go, constipation may be contributing too. You do not have to stop having bowel movements completely to be constipated. And one uncomfortable evening does not mean you need to start cutting foods out of your diet. Instead, look at what has been happening over several days. Are your stools harder than usual? Are you having to strain? Do you feel properly emptied after going to the toilet? Does the bloating ease after a comfortable bowel movement? Looking at these details together can give you a much clearer idea of what may be going on than focusing on one symptom on its own.

Sources

• National Institute of Diabetes and Digestive and Kidney Diseases: Symptoms and Causes of Constipation

• National Institute of Diabetes and Digestive and Kidney Diseases: Treatment for Constipation

• National Institute of Diabetes and Digestive and Kidney Diseases: Eating, Diet and Nutrition for Constipation

• National Institute of Diabetes and Digestive and Kidney Diseases: Gas in the Digestive Tract

• Johns Hopkins Medicine: How to Get Rid of Gas Pain

• Garzon Mora and Jaramillo, 2024: Effectiveness of Probiotics in Patients With Constipation

Medical Disclaimer: This article is for general educational purposes only and is not a substitute for medical advice, diagnosis or treatment. Constipation, bloating and gas can have many different causes. Speak with a qualified healthcare professional if symptoms are persistent, worsening or accompanied by blood in the stool, constant abdominal pain, vomiting, fever, inability to pass gas, unexplained weight loss or other concerning symptoms.