Is it possible for ulcerative colitis to turn into Crohn’s disease? My journey serves as a testament to the complexities of these inflammatory bowel diseases. After years of living with ulcerative colitis, I experienced an unexpected shift in my diagnosis, highlighting the importance of ongoing medical evaluation.
Living with inflammatory bowel disease (IBD) has been a rollercoaster of challenges and revelations. When I was diagnosed with ulcerative colitis (UC), I believed it would be a lifelong battle but one I could manage. However, my journey took an unexpected turn after my ostomy surgery, leading to a re-diagnosis: Crohn’s disease.
If you’re navigating a similar path or simply curious about the complexities of UC and Crohn’s, this is my story, along with important facts I’ve learned along the way.
The Start of My Ulcerative Colitis Diagnosis
My UC journey began with symptoms that many of you might recognize: chronic diarrhea, abdominal pain, bloating, blood in my stool, and overwhelming fatigue. These symptoms gradually worsened, leading to a diagnosis that brought both relief and apprehension.
Finally, I had a name for my condition, but little did I know at the time that my Ulcerative Colitis diagnosis would eventually be changed.

Ostomy Surgery
After years of trying medications, including steroids, biologics, and anti-inflammatory drugs, I reached a point where my UC became unmanageable. My colon was severely inflamed, at this point, I had toxic megacolon and my quality of life had deteriorated.
After getting sick enough to head to the emergency room, which wasn’t an easy decision to make, I eventually had the dreaded ostomy surgery—removing my colon and creating a stoma.
While the recovery wasn’t easy, I hoped the surgery as well as the 60 days spent in the hospital, would at least bring relief and allow me to regain control of my life.
From Ulcerative Colitis to Crohn’s Disease
Post-surgery, I expected my health to stabilize, but instead, I faced new challenges. Over time, I began experiencing symptoms that didn’t align with my UC diagnosis. I had persistent abdominal pain, hair loss, ulcers in different parts of my GI tract, and sores typically associated with Crohn’s disease, which raised concerns.
My healthcare team revisited my diagnosis and my UC had been reclassified as Crohn’s disease.
How Does UC Turn Into Crohn’s?
Although ulcerative colitis and Crohn’s disease are distinct conditions, initial diagnoses can sometimes change over time. Research shows that 10-15% of patients initially diagnosed with UC may later be reclassified as having Crohn’s colitis. This often happens when inflammation extends beyond the colon or when ulcers appear in areas like the small intestine.
Some common reasons for a change in diagnosis include:
- Symptoms Beyond the Colon: Crohn’s disease can affect any part of the GI tract, from the mouth to the anus.
- Deeper Inflammation: Unlike UC, which affects the colon’s lining, Crohn’s often involves deeper layers of the bowel wall.
- New Testing Technologies: Advances in diagnostic tools help distinguish between the two conditions more accurately.
Living with Crohn’s Disease
The transition from UC to Crohn’s has been daunting, but it has also taught me resilience. Crohn’s disease presents unique challenges, such as:
- Fistulas and strictures in the GI tract
- The need for additional medications, like biologics although those with UC may also require these meds
- A higher risk of malnutrition due to small intestine involvement
Managing Crohn’s involves staying informed about the latest treatment options as well as a bit of trial and error. I don’t always know what will cause a Crohn’s flare up and I haven’t fully figured out how to prevent them but I will keep trying.
It’s like wanting to diffuse a bomb when you’re not entirely sure which wire to cut—except the bomb is your own intestines, and there’s no action hero to save the day. I’ve learned that one day kale is my best friend, and the next, it’s plotting my demise. But hey, if nothing else, I’ll keep experimenting and maybe accidentally invent a new diet craze. “Flare-Free Fusion,” anyone?
Key Facts About Ulcerative Colitis to Crohn’s Disease
- Differences in Inflammation: UC affects only the colon, while Crohn’s can impact any part of the GI tract.
- Diagnosis Changes Are Common: Misdiagnosis or reclassification happens because of overlapping symptoms and the progressive nature of IBD.
- Post-Surgical Monitoring Is Crucial: Regular follow-ups are vital after ostomy surgery to monitor for new symptoms or complications.

Living with Crohn’s After Ostomy Surgery
Adjusting to my new diagnosis was overwhelming, but I’ve learned to navigate life with Crohn’s disease. I’ve had to tweak my treatment plan, monitor my diet closely, and stay vigilant about managing flare-ups. Despite the challenges of living with an ostomy, removing my colon has allowed me to live with less urgency and more freedom.
What I’ve Learned
- Advocate for Yourself: Don’t hesitate to ask your doctor questions or seek a second opinion if something doesn’t feel right.
- Listen to Your Body: Pay attention to new or changing symptoms, even after surgery.
- Stay Informed: Understanding the differences between UC and Crohn’s can help you better navigate your journey.
Hope for the Future
My journey from Ulcerative Colitis to Crohn’s disease after ostomy surgery has been a testament to the unpredictability of life with IBD. While my journey hasn’t been easy, it’s taught me resilience and adaptability.
For those of you navigating a similar path, know that you’re not alone. Whether you’re living with UC, Crohn’s, or adjusting to life with an ostomy, there’s always hope for better days ahead.

FAQ’s About Ulcerative Colitis to Crohn’s Disease
Can colitis turn into Crohn’s disease?
Yes, while ulcerative colitis (UC) and Crohn’s disease (CD) are distinct conditions, there is a small possibility that an initial UC diagnosis could later be reclassified as Crohn’s. Studies suggest that approximately 10-15% of patients initially diagnosed with UC may see their diagnosis change to Crohn’s disease over time. This usually occurs when new symptoms or inflammation patterns—such as involvement of the small intestine—emerge, suggesting Crohn’s rather than UC.
What factors are associated with the conversion of Ulcerative Colitis to Crohn’s disease?
The likelihood of a diagnosis change can be influenced by clinical “red flags,” such as inflammation extending beyond the colon, non-responsiveness to UC-specific treatments, or the development of fistulas or strictures. Advanced diagnostic tools, including imaging and biopsies, often play a role in detecting these changes.
What are the key differences between IBD and IBS?
Inflammatory bowel disease (IBD), which includes UC and Crohn’s, involves chronic inflammation of the GI tract and can lead to severe complications like ulcers and strictures. In contrast, irritable bowel syndrome (IBS) is a functional disorder affecting how the bowel works, without causing visible damage or inflammation.
Can Crohn’s disease cause joint pain?
Yes, joint pain is a common extra-intestinal manifestation of Crohn’s disease. This symptom, known as enteropathic arthritis, often affects larger joints like the knees and hips and may flare up alongside digestive symptoms. Joint tenderness and inflammation in the arms, legs, and sometimes spine
What medications are used to treat ulcerative colitis?
Treatment options for UC include aminosalicylates, corticosteroids, immunosuppressants, and biologics. These medications aim to reduce inflammation, manage symptoms, and maintain remission. The choice of treatment depends on the severity of the disease and patient-specific factors.
What complications can ulcerative colitis cause?
Untreated or poorly managed UC can lead to complications such as severe bleeding, toxic megacolon, an increased risk of colorectal cancer, and perforation of the colon. Routine screenings and proper treatment can help mitigate these risks.
What are the symptoms of severe Crohn’s disease?
Severe Crohn’s disease symptoms may include persistent abdominal pain, frequent diarrhea (possibly bloody), significant weight loss, fever, and fatigue. These symptoms can disrupt daily life and may require advanced treatments or surgical intervention.
Can Crohn’s disease develop suddenly?
While Crohn’s disease typically develops gradually, symptoms can occasionally appear suddenly and without warning, leading to an abrupt diagnosis. Sudden onset may be triggered by stress, infections, or dietary changes.
Why is ulcerative colitis difficult to treat?
UC is an autoimmune disease with a relapsing-remitting pattern, meaning that periods of remission are often followed by unpredictable flares. This variability, combined with the lack of a definitive cure, makes managing the condition complex. Treatments focus on controlling symptoms and extending periods of remission rather than an actual cure for the disease.
Which is worse: Crohn’s disease or ulcerative colitis?
Both Crohn’s disease and UC are serious conditions, but they differ in their impact. UC is sometimes considered more severe because it can require urgent surgical intervention, especially in cases of toxic megacolon or extensive colon involvement. However, Crohn’s disease can be more challenging to treat due to its potential to affect the entire digestive tract and cause complications like fistulas.
If you’ve experienced a similar journey or want to share your story, I’d love to hear from you in the comments. Let’s continue to support and inspire each other!
