Stomach pain, frequent bathroom visits, and ongoing diarrhea can sometimes be dismissed as minor issues. However, these symptoms may signal ulcerative colitis (UC), a chronic inflammatory condition affecting the colon that can worsen without medical intervention.
Ulcerative colitis is a form of inflammatory bowel disease (IBD) where inflammation begins in the rectum and may spread through the large intestine. This inflammation causes small ulcers, leading to rectal bleeding and changes in bowel habits.
Early diagnosis is important because effective treatment can reduce inflammation and lower long-term risks.
“Ulcerative colitis is essentially an autoimmune attack on your own intestinal cells,” said Dr. Hassan Dakik, a gastroenterologist at Houston Methodist. “It often develops in young adulthood, but it can flare up at any age.”
Common early symptoms include rectal bleeding, looser stools, urgency to use the bathroom, and increased frequency of bowel movements. Dr. Dakik explained: “Eventually, you might start to feel abdominal pain. It might start in the pelvic region and progress to the left abdomen, or it might be a more generalized pain that gets worse as the disease progresses.”
Some patients also experience symptoms outside the digestive tract such as joint pain or arthritis, skin rashes, eye inflammation or vision changes, mouth sores, and low bone density. “Because ulcerative colitis is autoimmune, it doesn’t just affect the colon,” said Dr. Dakik. “Sometimes the first signs are actually in the skin, joints or eyes.”
Most people with UC experience cycles of flare-ups and remission. Disease progression usually occurs before stabilization; deep clinical remission tends to happen later in life.
The exact cause of UC remains unclear but appears to involve several factors including immune system dysfunction—where healthy intestinal cells are mistakenly attacked—environmental triggers like infections or stress, certain medications such as NSAIDs, smoking, diet, and imbalances in gut bacteria. Genetic predisposition also plays a role: “There’s definitely a genetic predisposition as well,” said Dr. Dakik. “UC tends to cluster in families. Even identical twins can be affected differently.”
Ulcerative colitis differs from Crohn’s disease—the other main type of IBD—in that UC affects only the inner lining of the colon starting from the rectum upwards; Crohn’s can impact any part of the digestive tract with deeper patchy inflammation. Unlike irritable bowel syndrome (IBS), UC involves actual inflammation.
Medical attention should be sought for abrupt changes in bowel habits, blood or mucus in stool, or unexplained severe pain—symptoms that suggest underlying inflammation requiring evaluation. “Many people first assume it’s hemorrhoids or irritable bowel syndrome, or they might be misdiagnosed,” said Dr. Dakik. “Any change in bowel habits that feels abnormal for you is worth discussing with a doctor. Early evaluation can make a huge difference.”
Diagnosis usually begins with noninvasive tests such as blood work for markers of inflammation and anemia; stool tests for specific inflammatory markers; imaging like CT scans or ultrasounds; followed by colonoscopy with biopsies if UC is suspected. “A lot of people are anxious about getting a colonoscopy, but we can often do the noninvasive tests first,” said Dr. Dakik.
Treatment focuses on controlling inflammation and preventing flare-ups with plans tailored to severity and individual circumstances:
– Mesalamine therapy: Topical medication for mild cases targeting rectum/left colon.
– Biologic therapies: Main option for moderate/severe cases targeting specific proteins involved in inflammation.
– Immunomodulators: Sometimes used alongside biologics for stronger effect.
“We plan your treatment to match your life,” said Dr. Dakik. “We consider factors such as work, travel or family planning. We aim for most effective regimen with the lowest risk.”
Ongoing management includes regular lab tests throughout the year, monitoring medication response and side effects, checking nutrient levels, and periodic colonoscopies every one to two years after eight to ten years of disease duration. Many follow-up visits can now be conducted via video appointments: “With modern therapies, many visits can even be done by video,” said Dr. Dakik.
People living with IBDs like UC have an increased risk of colorectal cancer due to chronic inflammation causing cellular changes over time; thus regular screenings begin earlier than usual for these patients. “Cancer risk is related to how much inflammation there is over time,” said Dr. Dakik. “With good disease control and regular screening, we can lower that risk significantly.”
Lifestyle adjustments cannot replace medical therapy but may help reduce flare-ups and support overall gut health—avoiding NSAIDs like ibuprofen/naproxen; limiting alcohol; quitting smoking; managing stress through sleep/mindfulness/routines; staying hydrated; identifying food triggers such as dairy/high-fat foods/processed sugar—and exercising regularly which supports metabolism/stress regulation.
“There’s no universal UC diet,” said Dr. Dakik. “Most patients learn what triggers their symptoms and adjust over time.”
Dr. Dakik emphasized not ignoring persistent digestive symptoms: “If something about your digestion doesn’t feel normal, don’t ignore it… We have many tools to help — you don’t have to suffer in silence.”
