What should you know about metastatic Crohn's disease?

Crohn's disease is an inflammatory bowel condition. In this phrase, metastatic describes Crohn's-related lesions away from the intestine, often involving the skin or genital area, not metastasis from a cancer. These changes can occur with or without active bowel symptoms. Possible features include persistent swelling, sores, drainage, skin thickening or discomfort. Several skin and inflammatory conditions can look similar, so appearance alone cannot establish the cause. A clinician may review your bowel history, medicines and examination, and may arrange a biopsy or other tests when needed.

Book a GP or gastroenterology review if you have a new skin lesion, swelling, drainage or pain, particularly with known Crohn's disease. Keep a record of bowel changes, skin findings, fever and current treatments. Do not squeeze lesions or apply prescription creams from someone else. Gentle cleansing and keeping affected skin dry may reduce irritation while you wait for advice. A blood test can help assess inflammation or anaemia, but results are interpreted with the examination rather than used alone.

Seek urgent help for severe abdominal pain, repeated vomiting, a rigid or swollen abdomen, heavy bleeding, inability to pass stool or gas, or rapidly spreading redness with fever. Contact your care team promptly for worsening diarrhoea, dehydration symptoms, a painful draining lesion, or difficulty passing urine. These problems may need timely treatment even when the diagnosis is not yet certain.

Ask which body area is affected, whether a biopsy or blood test is appropriate, how bowel activity relates to the lesion, and whether your current Crohn's treatment needs review.