Crohn's disease is a chronic inflammatory bowel disease (IBD) that can affect anyone, often beginning between the ages of 15 and 35. While there is no cure, modern treatments have transformed what life with Crohn's can look like — many patients achieve long-term remission and lead full, active lives. As a gastroenterologist, my goal is to control inflammation, relieve symptoms, and help each patient build a management plan that fits their life. This guide walks through what Crohn's disease is and how it is treated today.
What Is Crohn's Disease?
Crohn's disease causes inflammation of the digestive tract. Unlike ulcerative colitis, which is limited to the colon, Crohn's can affect any part of the gastrointestinal tract from the mouth to the anus — though it most often involves the end of the small intestine (the ileum) and the beginning of the colon. The inflammation can also extend deep through the entire thickness of the bowel wall, which is why complications such as strictures and fistulas can develop.
Common Symptoms
Symptoms vary depending on which part of the digestive tract is involved and how active the disease is. They often come and go in cycles of flare-ups and remission.
- Persistent diarrhea
- Abdominal pain and cramping, often in the lower right area
- Fatigue and low energy
- Unintended weight loss and reduced appetite
- Blood in the stool
- Mouth sores
- Fever during active flares
Crohn's can also cause symptoms outside the gut, including joint pain, eye inflammation, skin problems, and in children, delayed growth.
What Causes Crohn's Disease?
The exact cause is not fully understood, but Crohn's develops from a combination of factors: an overactive immune response, genetics (a family history increases risk), and environmental triggers. Smoking is a well-established risk factor that also makes the disease harder to control. Crohn's is not caused by any single food, though diet can influence symptoms.
How Crohn's Disease Is Diagnosed
Because Crohn's shares symptoms with other conditions, diagnosis involves several steps:
- Blood and stool tests to check for inflammation, infection, and anemia
- Colonoscopy with biopsies to directly examine the colon and the end of the small intestine
- Imaging such as CT or MR enterography to evaluate the small intestine
- Capsule endoscopy (PillCam) in select cases to view areas a standard scope cannot reach
Treatment Options
Treatment is highly individualized. The goal is to reduce inflammation, achieve remission, and then maintain it. Today's medications are far more targeted than those of the past.
Medications
- Aminosalicylates (5-ASAs): Used for mild disease in some patients.
- Corticosteroids: Effective for calming acute flares but not intended for long-term use.
- Immunomodulators: Medications such as azathioprine that quiet an overactive immune system over time.
- Biologic therapies: Anti-TNF agents and other biologics that target specific parts of the immune response. These have been a major advance for moderate-to-severe Crohn's.
- Newer targeted therapies: Additional biologics and small-molecule drugs offer options when first-line treatments are not enough.
Nutrition Support
Because Crohn's can affect nutrient absorption, addressing nutrition is part of treatment. Some patients benefit from specialized diets during flares, and supplements may be needed to correct deficiencies in iron, vitamin B12, vitamin D, and other nutrients.
Surgery
When medications are not enough, or when complications such as strictures, fistulas, or abscesses develop, surgery may be recommended. Surgery does not cure Crohn's, but it can relieve symptoms and improve quality of life. Many patients continue medication afterward to keep the disease in remission.
Diet and Lifestyle
While no single diet works for everyone, keeping a food and symptom diary can help identify personal triggers. During flares, lower-fiber and easy-to-digest foods are often better tolerated. Other helpful steps include staying well hydrated, managing stress, getting regular gentle exercise, and — most importantly — not smoking.
Managing Flares and Staying in Remission
Taking medications consistently, even when you feel well, is the single most important factor in staying in remission. Regular monitoring — including periodic colonoscopy and lab work — allows us to catch inflammation early and adjust treatment before a flare becomes severe.
Living Well with Crohn's Disease
A Crohn's diagnosis can feel overwhelming, but with the right treatment plan most people gain good control of their disease. Building a strong partnership with your gastroenterologist, staying on top of monitoring, and tending to your overall well-being all make a meaningful difference. With today's therapies, long-term remission is a realistic goal.
Expert Digestive Care in Mountainside, NJ
At GastroCares, board-certified gastroenterologist Dr. Amber Khan provides personalized evaluation and treatment for patients across Union County and New Jersey. Take the first step toward better digestive health today.