IBS pain can show up in different parts of your abdomen, and it may stay in one place or seem to move around. Where you feel it can’t tell you whether it’s IBS or something else, which makes it frustrating to figure out what’s going on.
Noticing when the pain occurs, whether it eases after a bowel movement, and whether your stool frequency or form changes can help your doctor assess your symptoms.
Where IBS Pain Usually Occurs
IBS pain can occur around the belly button, above the pubic bone, in the lower abdomen, or on either side. A nationwide study found that pain patterns varied by IBS subtype, with more widespread pain reported among people with constipation-predominant or mixed IBS than those with diarrhea-predominant IBS.
Pain location alone cannot confirm IBS or rule out another condition. Pain may also change after a bowel movement or alongside changes in stool frequency or form.
Why IBS Can Cause Abdominal Pain
IBS is a disorder of gut-brain interaction. Changes in communication between the gut and brain can affect bowel function and how strongly you feel digestive sensations. Gas or stool may cause pain in someone with IBS even when the same sensations cause less discomfort in another person, according to the NIDDK.
Other symptoms can include bloating, constipation, diarrhea, a feeling that a bowel movement is incomplete, or whitish mucus in the stool.
Can IBS Pain Be on One Side?
Yes. IBS pain can be concentrated in one area or on one side, but one-sided pain can also occur with appendicitis, kidney stones, diverticulitis, or gallbladder problems.
Do not assume new or noticeably different pain is IBS, even if you have already been diagnosed. Persistent or worsening pain deserves medical assessment.
How Doctors Assess IBS Pain
Doctors consider your overall symptoms, not just where you feel pain. Under the Rome V criteria, IBS involves recurrent, but not continuous, abdominal pain or discomfort averaging at least three days per month over the previous three months. It must be associated with at least two of the following:
- A relationship to bowel movements.
- A change in stool frequency.
- A change in stool form.
The formal criteria require symptoms to have begun at least six months before diagnosis. Rome V also publishes separate clinical criteria for routine practice that omit this duration requirement, allowing doctors to assess symptoms before that time has elapsed.
These criteria are not a self-diagnosis checklist, and a doctor can determine whether your symptoms fit IBS and whether testing is appropriate.
What Actually Helps
Treatment depends on your symptoms and medical history, and while these options may help, none works for everyone.
Soluble fiber, especially psyllium. A meta-analysis found that soluble fiber can improve IBS symptoms, while wheat bran showed no significant benefit. The evidence has limitations, and adding fiber too quickly can worsen gas and bloating, so build up gradually.
A time-limited low-FODMAP trial. This diet reduces certain carbohydrates that can draw water into the gut and produce gas. It typically involves restriction for two to six weeks, followed by reintroduction and personalization. The ACG guideline supports a limited trial. A dietitian can help prevent unnecessary restrictions and nutritional gaps.
Peppermint oil. A meta-analysis found that peppermint oil may improve overall IBS symptoms and abdominal pain, though the evidence was rated very low quality and side effects were more common. It can also cause heartburn or indigestion.
Gut-directed therapy. Cognitive behavioral therapy and hypnotherapy aimed at gut-brain signaling are suggested in the ACG guideline for overall IBS symptoms, and may help when symptoms persist.
Other treatments. The ACG guideline suggests against routine use of probiotics and antispasmodics available in the United States for overall IBS symptoms because of limitations in the evidence. Prescription treatments are available for constipation-predominant and diarrhea-predominant IBS. A clinician can help you choose appropriate options.
