The colon then develops ulcers (open sores) that produce blood, pus, and mucus. The small intestine is rarely affected. There are several subtypes of ulcerative colitis, which are named according to the part of the colon affected:

Ulcerative proctitis, which affects only the rectumProctosigmoiditis, which affects the rectum and lower segment of the colon (sigmoid colon)Left-sided colitis, which affects the rectum, sigmoid colon, and descending colon up to the sharp bend near the spleenPan-ulcerative or total colitis, which affects the entire colon

Symptoms of the disease typically develop gradually and come and go. Periods without active disease — known as remission — may last for months or even years. Over time, ulcerative colitis can progress to cover more of the colon. This typically leads to more severe disease and greater symptoms. If left untreated, UC can also lead to a number of complications:

MalnutritionPerforated colonOsteoporosisLiver diseaseColorectal cancerToxic megacolon

Your immune system is supposed to defend you against harmful invasive bacteria and viruses. But in some people, the immune system mistakenly attacks the body’s own tissue. While we don’t know exactly what causes ulcerative colitis, there are two leading theories: Experts believe that ulcerative colitis develops because of a combination of environmental factors and genetic predisposition. Fatty cold-water fish — such as mackerel, tuna, salmon, sardines, and herring — are rich sources of omega-3 fatty acids. This will be done with a combination of your history of symptoms, lab tests, imaging scans, and a view of the inside of your colon using a flexible tube and camera (colonoscopy or sigmoidoscopy). People living with ulcerative colitis typically experience periods of both active disease and remission. The goal of treatment is to achieve remission. Drugs for ulcerative colitis work by reducing inflammation in your colon. Some drugs are commonly used for maintenance therapy — to help you stay in remission — while others are used to treat disease activity during flares. You may need a combination of drugs for optimal treatment. Surgery may be necessary if your body isn’t responding well to drugs or if you have severe complications that require urgent treatment. Surgery to remove the entire colon is curative. Aminosalicylates are typically the first kind of drug prescribed for ulcerative colitis. They work by reducing inflammation directly in your digestive tract and can be taken on an ongoing basis. Corticosteroids, also known simply as steroids, are used to treat disease flares. Most drugs of this type work by suppressing the entire immune system, so they can have severe side effects and shouldn’t be taken for long periods. Biologics are made of antibodies that are grown in the lab and work by stopping certain proteins in the body from causing inflammation. Small molecules are oral medications that also work on the immune system but act differently from biologics. These drugs are used to treat moderate to severe ulcerative colitis. Immunomodulators are a second-line drug for treating ulcerative colitis. These drugs limit inflammation at its source in the immune system. Other drugs for ulcerative colitis may include antibiotics and certain pain relievers. You’re more likely to need to change your diet during periods of active disease (flares), when eating soft, bland foods can help limit symptoms like cramping and diarrhea. With guidance from a doctor, a liquid meal replacement diet known as an elemental diet, can also help achieve remission from active disease. During flares, you may also want to avoid or limit high-fiber and high-fat foods, as well as alcohol, dairy products, and spicy foods. If you’re losing nutrients and water in your diet due to diarrhea, you may need to focus on increasing your fluid intake and getting enough calories, protein, vitamins, and minerals from foods or supplements. Ulcerative colitis tends to run in families, affecting men and women equally overall. But older men are more likely to develop it than older women, according to the Crohn’s and Colitis Foundation. Although the disorders share some of the same symptoms, such as abdominal pain and diarrhea, inflammation and ulcers do not occur with IBS. Another disease often mentioned alongside ulcerative colitis is Crohn’s disease. Ulcerative colitis and Crohn’s are different types of IBDs that affect the digestive tract in different ways. The two diseases have a lot of common symptoms, but certain symptoms may make your doctor suspect one disease versus the other. While diarrhea, rectal bleeding, and abdominal pain are common in both diseases, Crohn’s disease more often causes nausea, weight loss, and vomiting. The types of abdominal pain are often somewhat different. Ulcerative colitis is limited to the lining of the large intestine (colon), whereas Crohn’s disease can affect the entire digestive tract — from your mouth to your anus — and isn’t limited to the inner part of the intestines. A number of resources are available to help people with UC manage these difficult times — from medication assistance to virtual therapy for mental health. Each year, Everyday Health editors attend DDW, the world’s largest gathering of physicians, researchers, and industry in the fields of gastroenterology, hepatology, endoscopy, and gastrointestinal surgery. Crohn’s and Colitis Foundation (CCF) CCF is the leading nonprofit organization dedicated to finding the cure for UC and Crohn’s. The organization is at the forefront of IBD research and works to educate, empower, and support individuals afflicted with these diseases. Find your local chapter by visiting the CCF website. American Society of Colon and Rectal Surgeons This society, made up of more than 3,000 colon and rectal surgeons, is dedicated to advancing and promoting the science and practice of treating patients with diseases and disorders affecting the colon, rectum, and anus. Although it is geared toward professionals in the field, the website has an educational library with videos and resources for finding a surgeon. Benaroya Research Institute, Virginia Mason This research institute at Virginia Mason in Seattle is one of the few establishments devoted to finding the causes of autoimmune diseases like UC and their cures. Benaroya has already helped advance research in more than 80 diseases of the immune system. The autoimmune life blog provides information on community events and personal stories from patients living with an autoimmune disease.

Favorite Ulcerative Colitis Blogger

SoBadAss.Me Sam Cleasby created her blog in 2013 to raise awareness of IBD and her struggles with self-esteem. Cleasby also has a radio show on BBC Radio Sheffield in which she shares about modern family life, including relationships, disability, nutrition, and kids. You can subscribe to her blog via email or follow her on Facebook or Twitter.

Favorite Resource for Diet Advice

  This book by A. Hillary Steinhart, MD, provides dietary strategies and recipes to help manage inflammatory bowel disease. The head of the combined division of gastroenterology for Mount Sinai Hospital and the University Health Network in Toronto’s Mount Sinai Hospital, Dr. Steinhart worked with the clinical dietitian Julie Cepo to offer well-researched dietary advice for people to maintain health during flare-ups as well as periods of remission. The book is packed with 150 recipes, from risotto to stew, to help anyone with IBD eat well and prevent malnutrition. Against All Grain Doctors assured Danielle Walker that her diet was not a factor in her ulcerative colitis flares. But after years of suffering and multiple hospitalizations, Walker realized that she needed to make dietary changes. At the two-year remission mark, the mom, wife, and self-trained chef began blogging about her experience and sharing recipes to help others struggling with IBD. You can buy Walker’s cookbooks on her website, which is loaded with nutritional resources including a blog and videos.

Favorite Apps

Oshi Health This all-in-one app helps you track symptoms and general information about sleep, stress, diet, and fitness, which you can share with your doctor. You can also read doctor-approved articles or ask questions directly to medical experts. For more of our favorite ulcerative colitis apps, check out 5 Phone Apps for People with UC.

Favorite Retreats

Camp Oasis Over a decade ago, the CCF established a residential summer camp to enrich the lives of children living with IBD. The camp is offered in most major regions nationwide as a way for adolescents living with IBD to see that they are not alone, try their hand at new sports and activities, and create friendships with people who truly understand them. Ages vary by camp location. To find a camp near you, please visit the Crohn’s and Colitis Foundation website. Girls With Guts What started as a weekend get-together among five IBD bloggers has grown into a worldwide support network of women living with inflammatory bowel disease. Group members share stories and experiences to help one another gain confidence despite IBD or an ostomy. The organization provides supplies for those in need of help from ostomy surgery, as well as a pen pal program to help women connect, and an annual retreat. Sign up for their newsletter to receive news and updates quarterly.