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Published on: 8/20/2026

What could cause a stomach ache accompanied by diarrhea?

Stomach pain with diarrhea is commonly caused by Irritable Bowel Syndrome (IBS) or other functional bowel disorders. Other potential causes include viral or bacterial infections, food intolerances, and colitis (inflammation of the colon).

Because these conditions share overlapping symptoms but require very different treatments, identifying the likely cause early can help you avoid complications and get relief faster. A quick, free symptom check can help you understand what may be driving your symptoms and guide your next steps — all in just a few minutes, online and instantly.

Reviewed for medical accuracy: 07/15/2026

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Explanation

Stomach aches and diarrhea can be symptoms of conditions like Irritable Bowel Syndrome (IBS) with diarrhea. IBS is a common disorder that affects the large intestine and can cause cramping, abdominal pain, bloating, gas, and diarrhea. IBS is considered a functional bowel disorder, which means it is related to how the gut and brain work together, rather than a structural problem.

Functional bowel disorders, as discussed in the references, are a group of disorders characterized by persistent gut symptoms. They are not caused by any identifiable structural or biochemical abnormalities. These disorders can vary in their symptoms and severity, but they often involve abdominal pain and changes in bowel habits, such as diarrhea or constipation.

Other possible causes are related to infections such as gastroenteritis, colitis, or simply a stomach bug. Or food poisoning.

If you experience these symptoms, you can use Ubie's free AI symptom checker to help identify potential causes and determine next steps. Keep in mind that while these symptoms can be uncomfortable, they are common and manageable with proper care, and it's important to consult a healthcare provider to rule out other causes and discuss management options.

(References)

  • Marasco G, Cremon C, Barbaro MR, Stanghellini V, & Barbara G. (2024). Management of Irritable Bowel Syndrome With Diarrhea. Journal of clinical gastroenterology, 38227850.

  • Bharucha AE, Chakraborty S, & Sletten CD. (2016). Common Functional Gastroenterological Disorders .... Mayo Clinic proceedings, 27492916.

  • Thompson WG, Longstreth GF, Drossman DA, Heaton KW, Irvine EJ, & Müller-Lissner SA. (1999). Functional bowel disorders and functional abdominal pain. Gut, 10457044.

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