Lupus and ulcerative colitis: what should you know?

Lupus is an autoimmune condition that can affect several parts of the body, including skin, joints, kidneys, blood, lungs, and nerves. Ulcerative colitis is inflammation of the lining of the large bowel and commonly presents with diarrhoea, urgency, rectal bleeding, abdominal pain, or mucus. These bowel symptoms are not proof of either condition on their own. A clinician considers the symptom pattern, examination, medicines, blood or stool tests, and sometimes bowel investigations.

Record stool frequency, blood or mucus, pain location, fever, weight change, food triggers, and lupus symptoms. Take prescribed medicines consistently and check before using anti-inflammatory pain medicines or supplements, since some products can irritate the bowel or affect other lupus treatment. Book a GP consultation for persistent diarrhoea, recurrent abdominal pain, or blood in the stool. Bring your medicine list and any previous test results.

Seek urgent help for heavy rectal bleeding, severe or worsening abdominal pain, repeated vomiting, fainting, confusion, a swollen abdomen, or signs of dehydration such as very little urine and marked dizziness. Contact your clinical team promptly if bowel symptoms are escalating or occur with fever, profound weakness, or a suspected lupus flare.

Ask whether your symptoms fit ulcerative colitis, infection, medicine-related irritation, or another bowel problem; which tests are appropriate; and how lupus treatment should be coordinated if bowel inflammation is confirmed. Ask when colorectal cancer screening is due for your individual situation.