What should you know about ulcerative colitis in infants?

Ulcerative colitis is inflammation of the lining of the large bowel. In infants, possible signs include frequent loose stools, blood or mucus in the nappy, tummy discomfort, reduced feeding, tiredness and difficulty gaining weight. Diarrhoea can have many causes, so it does not by itself establish ulcerative colitis. A paediatric clinician considers the pattern, the infant’s growth, hydration and other explanations.

The assessment may include questions about nappies, feeds, vomiting, fever, family history and recent infections. Examination and tests can help separate bowel inflammation from infection, food-related problems or other conditions. A parent’s record of stool changes and feeding can be useful.

Arrange a medical assessment if an infant has ongoing diarrhoea, blood in the stool, repeated abdominal discomfort or a noticeable change in feeding. Keep offering feeds as advised by the child’s clinician, and do not start elimination diets or anti-diarrhoeal medicines without guidance. Record wet nappies, stool appearance, vomiting, temperature and feeding changes.

A clinician may refer the infant to a paediatric gastroenterology team. Treatment depends on the findings and may include medicine, nutrition support and monitoring of growth. Use prescribed treatment exactly as directed and attend follow-up visits.

Seek urgent medical help if the infant is unusually sleepy, difficult to wake, refusing feeds, passing very few wet nappies, repeatedly vomiting, has a swollen or very painful abdomen, or has a large amount of blood in the stool. These signs can indicate dehydration, significant inflammation or another urgent illness. Do not wait for a routine appointment when an infant’s condition is rapidly worsening.

Ask what other causes have been considered, which symptoms should prompt urgent review, how hydration and growth will be monitored, and whether a paediatric gastroenterology referral is needed. You can also ask how to give feeds and prescribed medicines during a flare.