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Published on: 8/20/2026
Why might the left side of my stomach appear more bloated than the right?
Bloating on the left side of your stomach is often caused by irritable bowel syndrome (IBS), trapped gas in the descending colon, or post-surgical changes such as scar tissue or altered digestion. Other possible causes include constipation, diverticulitis, or an enlarged spleen. Because symptoms overlap across many conditions, identifying the root cause matters.
The fastest way to get clarity is to take a free, instant, online symptom check. In just a few minutes, you'll receive personalized insights based on your symptoms, helping you understand possible causes and decide whether self-care, a doctor's visit, or urgent attention is your best next step.
Reviewed for medical accuracy: 07/15/2026
Quick answers
Frequently Asked Questions
4 answersThe most common questions people search after this page
- Most askedBloated? Why Your Gut Is Revolting: Medically Approved Irritable Bowel Syndrome Next Steps
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- Why Am I Always Bloated? The GI Conditions Doctors Look for First
- Always Bloated? Why Your Gut Is Swelling & Medically Approved Next Steps
Concerned about your symptoms?
Explanation
The left side of your stomach might appear more bloated than the right for a couple of reasons. One possibility is a condition called a permanent flank bulge that can occur in patients after flank surgery, which is the side of your body between your ribs and hip. Sometimes, after such surgeries, the muscles don't heal perfectly, leading to a bulge that can make one side look bigger.
Another reason could be irritable bowel syndrome (IBS). IBS is a common condition that affects the digestive system and can cause symptoms like bloating, especially on one side of the stomach. People with IBS might feel discomfort or see a difference in how their stomach looks because of gas or changes in bowel habits.
If you're noticing a change in your stomach's appearance, you should always talk to a healthcare provider who can help figure out what's going on and ensure there are no serious underlying conditions. To better understand your symptoms and get personalized guidance, try Ubie's free AI symptom checker for quick insights into what might be causing your one-sided bloating.
(References)
Chatterjee S, Nam R, Fleshner N, & Klotz L. (2004). Permanent flank bulge is a consequence of flank incision .... Urologic oncology, 14969802.
Corsetti M, & Whorwell PJ. (2015). Managing irritable bowel syndrome in primary care. The Practitioner, 26455114.
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