Ulcerative colitis and unintentional weight loss

During an ulcerative colitis flare, inflammation can reduce appetite and increase bowel symptoms. Diarrhoea may make eating difficult and can lead to fluid and nutrient losses. Abdominal pain, urgency, nausea, or fear of triggering symptoms may also reduce food intake. Weight loss can sometimes happen because treatment is not controlling inflammation, because another digestive problem is present, or because food choices have become too restricted.

Book a GP Consultation or contact your inflammatory bowel disease team, particularly if the change is continuing. Keep a record of weight trend, stool frequency, blood or mucus, pain, appetite, and medicines. Drink regularly and choose small, nourishing meals that you tolerate; do not start a restrictive diet or stop prescribed treatment without advice. Assessment may include examination, blood tests, stool tests, and a review of disease control and nutrition.

Seek urgent help for severe or worsening abdominal pain, a swollen abdomen, repeated vomiting, inability to keep fluids down, faintness, confusion, or heavy rectal bleeding. Prompt review is also needed when weight loss occurs with persistent fever, marked weakness, or a rapid increase in diarrhoea.

Could my ulcerative colitis be active? Do I need tests for anaemia, inflammation, infection, or nutrient deficiency? Would a dietitian help me maintain nourishment without worsening symptoms?