Inflammatory Bowel Disease
What is Inflammatory Bowel Disease?
Inflammatory bowel disease, often called IBD, is a group of conditions that cause long-term inflammation in your digestive tract. The two main types are Crohn's disease and ulcerative colitis. Both involve your immune system mistakenly attacking healthy tissue in your gut.
Crohn's disease can affect any part of your digestive tract from mouth to anus. Ulcerative colitis only affects your colon and rectum. Both conditions cause periods of active symptoms called flares and periods of remission when symptoms improve or disappear.
IBD is different from irritable bowel syndrome, or IBS. IBS affects how your bowels function but does not cause visible inflammation or damage. IBD creates real tissue damage that doctors can see during tests. About 3 million adults in the United States live with IBD.
Symptoms
- Persistent diarrhea that may contain blood or mucus
- Abdominal pain and cramping, often in the lower right area
- Urgent need to have bowel movements
- Unexplained weight loss and reduced appetite
- Fatigue and low energy levels
- Fever during flare-ups
- Mouth sores or ulcers
- Joint pain and swelling
- Skin rashes or eye inflammation
- Anemia from chronic blood loss
Some people have mild symptoms for years before getting a diagnosis. Others experience severe symptoms that develop quickly. Symptoms often come and go in cycles of flares and remission.
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Causes and risk factors
The exact cause of IBD remains unknown, but researchers believe it involves a combination of immune system problems, genetics, and environmental factors. In people with IBD, the immune system mistakes harmless bacteria and food in the intestines for threats. This triggers an inflammatory response that damages the gut lining over time.
Having a family member with IBD increases your risk by 5 to 20 times. Certain gene variations, especially HLA B types, are more common in people with IBD. Environmental factors matter too. Smoking increases Crohn's disease risk but may slightly protect against ulcerative colitis. High-fat diets, processed foods, stress, and certain medications like NSAIDs can trigger flares. IBD most often develops between ages 15 and 35, though it can occur at any age.
How it's diagnosed
Doctors diagnose IBD using a combination of medical history, physical exams, lab tests, and imaging studies. Blood tests play an important role in detecting inflammation and ruling out other conditions. Tests for C-reactive protein and high-sensitivity CRP measure inflammation levels in your body. Elevated CEA levels may appear during active disease. Testing for tissue transglutaminase antibody helps rule out celiac disease, which shares similar symptoms.
Rite Aid offers add-on inflammatory marker testing at Quest Diagnostics locations nationwide. Your doctor may also order stool samples to check for infections and blood. Colonoscopy or endoscopy lets doctors view your intestinal lining directly and take tissue samples. Imaging tests like CT or MRI scans help see the full extent of inflammation and any complications.
Treatment options
- Anti-inflammatory medications like aminosalicylates to reduce gut inflammation
- Immune system suppressors to prevent your immune system from attacking your intestines
- Biologic therapies that target specific proteins involved in inflammation
- Corticosteroids for short-term use during severe flares
- Anti-diarrheal medications and pain relievers for symptom management
- Low-residue or low-FODMAP diet during flares to reduce bowel irritation
- Avoiding trigger foods like dairy, high-fiber foods, spicy foods, and alcohol
- Stress management through meditation, yoga, or counseling
- Regular exercise to reduce inflammation and maintain bone health
- Surgery to remove damaged sections of intestine when medications fail
Need testing for Inflammatory Bowel Disease? Add it to your panel.
- Simple blood draw at your nearest lab
- Results in days, not weeks
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Frequently asked questions
Crohn's disease can affect any part of your digestive tract and often spreads deep into tissue layers. Ulcerative colitis only affects the colon and rectum and stays in the innermost lining. Crohn's disease may appear in patches with healthy tissue in between, while ulcerative colitis creates continuous inflammation. Both cause similar symptoms but may require different treatment approaches.
Blood tests cannot diagnose IBD on their own but provide valuable information about inflammation levels. Tests like C-reactive protein and high-sensitivity CRP show how much inflammation is present in your body. Your doctor uses blood test results along with colonoscopy, imaging, and symptoms to make a diagnosis. Blood tests also help monitor disease activity and treatment response over time.
IBD is a chronic condition with no known cure, but it can be managed effectively with proper treatment. Many people achieve long periods of remission with few or no symptoms. The goal of treatment is to reduce inflammation, control symptoms, and prevent complications. Working closely with a gastroenterologist helps you find the right combination of medications and lifestyle changes.
Trigger foods vary from person to person, but common culprits include dairy products, high-fiber foods, spicy foods, and alcohol. Fatty or fried foods, caffeine, and carbonated drinks may worsen symptoms during flares. Keeping a food diary helps identify your personal triggers. A registered dietitian can help you create a nutrition plan that provides adequate nutrients while minimizing symptoms.
Stress does not cause IBD, but it can trigger flares or worsen existing symptoms. When you experience stress, your digestive system may become more sensitive and inflamed. Managing stress through relaxation techniques, regular exercise, and adequate sleep may help reduce flare frequency. Many people with IBD benefit from counseling or support groups.
Testing frequency depends on your disease activity and treatment plan. During active flares or when starting new medications, your doctor may order tests every few weeks. Once your condition is stable, testing every 3 to 6 months helps monitor inflammation and medication side effects. Your gastroenterologist will recommend a testing schedule based on your individual needs.
About 60 to 75 percent of people with Crohn's disease and 25 to 40 percent with ulcerative colitis eventually need surgery. Surgery may be necessary if medications stop working, complications develop, or quality of life becomes severely affected. For ulcerative colitis, removing the colon can be curative. Early diagnosis and proper medical treatment may reduce the need for surgery.
Most women with IBD can have healthy pregnancies and babies. The key is achieving remission before conception, as active disease increases complications. Some IBD medications are safe during pregnancy while others should be avoided. Work with both your gastroenterologist and obstetrician to create a safe treatment plan. Flares during pregnancy may increase the risk of preterm birth or low birth weight.
Long-term IBD, especially ulcerative colitis affecting the entire colon, increases colorectal cancer risk. The risk rises with disease duration and extent of inflammation. Regular colonoscopy screenings help detect precancerous changes early. People with IBD for 8 years or more typically need colonoscopies every 1 to 3 years. Keeping inflammation under control with proper treatment may reduce cancer risk.
Children can develop IBD, and about 25 percent of cases start before age 20. Pediatric IBD may be more aggressive and extensive than adult-onset disease. Children with IBD need careful monitoring of growth, nutrition, and bone health. Early diagnosis and treatment help prevent complications and support normal development. Family support and age-appropriate education help children manage their condition.