What is ulcerative colitis?
Ulcerative colitis is a chronic inflammation of the large bowel, marked by ulcers and inflammation in the lining of the gut. This condition belongs to a group of illnesses called inflammatory bowel disease, or IBD, and usually affects the rectum and the large bowel. The exact cause of ulcerative colitis is not yet fully understood, but it is thought that a combination of genetic factors, the immune system, and environmental influences all play a part.
Imagine the bowel as a long, winding tube lined with a delicate layer of tissue. In ulcerative colitis, this lining is attacked and becomes inflamed, which leads to painful ulcers. This inflammation can cause symptoms such as diarrhoea, stomach pain, and blood in the stool. The illness often follows a pattern of flare-ups, meaning that periods of severe symptoms alternate with periods of fewer or no symptoms at all.
Causes and risk factors of ulcerative colitis
The exact causes of ulcerative colitis are not yet fully understood, but several factors seem to increase the risk. A family history plays a role, as people with relatives who have ulcerative colitis are more likely to develop it themselves. The immune system is also involved: it overreacts to harmless bacteria in the bowel and triggers inflammation as a result. Environmental factors such as a western diet, smoking, and stress can also increase the risk or bring on flare-ups.
Symptoms and possible complications
The symptoms of ulcerative colitis can vary from person to person, but diarrhoea, which is often bloody, and cramping stomach pain are common. Some people also feel a constant urge to go to the toilet, even when the bowel is empty. In severe cases, fever, tiredness, and weight loss can also occur. Over the long term, the chronic inflammation can lead to complications such as narrowing of the bowel or an increased risk of bowel cancer.
Diagnosis and examinations
Several tests are needed to diagnose ulcerative colitis. First, the doctor will take a detailed medical history and carry out a physical examination. A colonoscopy is often the next step, during which the doctor examines the large bowel using a camera (a colonoscope) and takes tissue samples. Blood tests and stool tests can also be helpful for identifying markers of inflammation and ruling out other causes. In some cases, imaging methods such as a magnetic resonance imaging (MRI) scan or a computed tomography (CT) scan may be used to assess the condition of the bowel more closely.
Treatment and therapy approaches
The treatment of ulcerative colitis aims to reduce inflammation, relieve symptoms and prevent flare-ups. Medicines such as aminosalicylates, corticosteroids, and immunomodulators are commonly used. In severe cases, biologics that act directly on the immune system may be necessary. A balanced diet and stress management are also important parts of treatment. In some cases, when medicines are not effective enough or complications arise, surgery may be required to remove affected parts of the bowel.
Prevention and lifestyle changes
Although there is no certain way to prevent ulcerative colitis, certain lifestyle changes can help to reduce flare-ups and improve quality of life. A fibre-rich diet with plenty of fruit and vegetables can support bowel health. Reducing stress through techniques such as yoga, meditation, or regular exercise can also be helpful. Smoking should be avoided, as it can trigger flare-ups. Regular medical check-ups are important to keep track of the illness and to respond to any changes early.
