Irritable Bowel Syndrome: Causes, Symptoms, and Treatment
Written by Achuta Uppu, MD. Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Irritable Bowel Syndrome?
A primary care doctor can often diagnose and treat irritable bowel syndrome (IBS). A gastroenterologist, a doctor who treats digestive problems, can help if symptoms are hard to control or other conditions need to be ruled out. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is irritable bowel syndrome?
Irritable bowel syndrome (IBS) is a problem with how your brain and gut work together. It causes pain in your belly and changes in your bowel movements. IBS can be painful, but it does not lead to other health problems or damage your digestive tract.
IBS is a chronic disorder, meaning it lasts a long time, often years. However, the symptoms may come and go.
Symptoms
The most common symptoms are pain in your belly, often related to your bowel movements, and changes in your bowel movements. These changes may be diarrhea, constipation, or both, depending on what type of IBS you have. Other symptoms may include:
- Bloating
- The feeling that you have not finished a bowel movement
- Whitish mucus in your stool
Causes and who gets it
Doctors are not sure what causes IBS. Experts think a mix of problems may lead to it. The mix can differ from person to person.
In some people with IBS, food moves too slowly or too quickly through the digestive tract. This changes bowel movements. Some people feel pain when a normal amount of gas or stool is in the gut.
Some problems are more common in people with IBS. These include stressful or difficult events early in life, depression, anxiety, and bacterial infections in the digestive tract. Others are food intolerances and small intestinal bacterial overgrowth, which is a rise in the number of bacteria in the small intestine, or a change in their type. Genes may also make some people more likely to develop IBS.
How doctors diagnose it
Doctors review your symptoms and your medical and family history. They also do a physical exam. They look for a pattern in your symptoms. In most cases, doctors do not use tests to diagnose IBS.
Your doctor may diagnose IBS if you have belly pain along with two or more of these:
- Your pain is related to your bowel movements
- You notice a change in how often you have a bowel movement
- You notice a change in the way your stools look
Your doctor may diagnose IBS if you have had symptoms at least once a week in the last 3 months and they first started at least 6 months ago.
Your doctor may order blood tests, stool tests, or other tests to check for other health problems. A hydrogen breath test can check for bacterial overgrowth or lactose intolerance. An upper GI endoscopy with a biopsy can check for celiac disease. A colonoscopy can check for colon cancer or inflammatory bowel disease.
Treatment
Doctors may treat IBS with changes in what you eat, other lifestyle changes, medicines, probiotics, and mental health therapies. You may have to try a few treatments to see what works best for you.
Your doctor may suggest eating more fiber, avoiding gluten, or following a special eating plan called the low FODMAP diet. Research suggests that more physical activity, reducing stressful life situations, and enough sleep may also help.
Medicines depend on your type of IBS. For IBS with diarrhea, options include loperamide and rifaximin, an antibiotic. Alosetron is given only to women. It comes with special warnings and precautions. For IBS with constipation, options include fiber supplements (when eating more fiber does not help), laxatives, and linaclotide. For belly pain, doctors may suggest antispasmodics, low doses of some antidepressants, or coated peppermint oil capsules. Follow your doctor's instructions and ask about side effects.
Researchers are still studying probiotics for IBS. Talk with your doctor before using probiotics or any other complementary or alternative medicine. Mental health therapies include cognitive behavioral therapy, gut-directed hypnotherapy, and relaxation training.
When to see a doctor
Talk to your doctor if your symptoms are like the symptoms of IBS. Tell your doctor if you have anemia, bleeding from your rectum, bloody stools, black and tarry stools, or weight loss. These signs may mean you have another health problem instead of IBS.
Call 911 if you have severe belly pain or pressure, or bleeding that will not stop.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either kind of doctor can review your symptoms, order first tests, and help you try diet and lifestyle changes. They can also follow your progress over time and refer you to a gastroenterologist if needed.
Common questions
Does IBS damage the intestines?
No. IBS can be painful, but it does not damage your digestive tract or lead to other health problems.
Is IBS a long-term condition?
Yes. IBS is chronic, meaning it lasts a long time, often years. The symptoms may come and go.
Is there a test for IBS?
In most cases, no. Doctors do not use tests to diagnose IBS. They look for a pattern in your symptoms, and they may order tests to check for other health problems.
Can changes in diet help IBS?
Yes. Changes in what you eat may help treat your symptoms. Your doctor may suggest eating more fiber, avoiding gluten, or following the low FODMAP diet.
Sources
- National Institute of Diabetes and Digestive and Kidney Diseases - Symptoms & Causes of Irritable Bowel Syndrome
- National Institute of Diabetes and Digestive and Kidney Diseases - Diagnosis of Irritable Bowel Syndrome
- National Institute of Diabetes and Digestive and Kidney Diseases - Treatment for Irritable Bowel Syndrome
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
