What is Enteropathic Arthritis?
Enteropathic arthritis is joint inflammation that occurs in people with inflammatory bowel disease — Crohn's disease or ulcerative colitis. It affects up to a third of patients with IBD and can involve the peripheral joints, the spine, or both. Joint symptoms sometimes appear before any bowel symptoms.
Also called: IBD-associated arthritis
Who gets Enteropathic Arthritis?
Up to 30 per cent of people with inflammatory bowel disease develop some form of arthritis, and it is the commonest complication of IBD outside the gut. It can begin at any age, including childhood. Spinal involvement is associated with HLA-B27. In some patients the joints are affected first, and persistent unexplained diarrhoea, blood in the stool or weight loss alongside arthritis should prompt a bowel assessment.
What are the symptoms of Enteropathic Arthritis?
Not everyone has every symptom below, and having one does not confirm the diagnosis. These are the features that most often lead to assessment:
- Pain and swelling in a few large joints — knees, ankles, wrists — that flares alongside bowel disease
- A separate pattern affecting many small joints, which runs independently of bowel activity
- Lower back and buttock pain with morning stiffness that improves with movement
- Heel pain and swollen fingers or toes
- Painful red eyes
- Tender red nodules on the shins, or painful skin ulcers
- Mouth ulcers
- Fatigue and anaemia
How is Enteropathic Arthritis diagnosed?
The diagnosis is made on the joint pattern in someone with known inflammatory bowel disease. Where bowel disease is not yet diagnosed, faecal calprotectin, blood counts, iron studies and — where indicated — colonoscopy establish it.
Inflammatory markers may be raised by the bowel disease as much as the joints, so they are interpreted with care. Sacroiliac imaging is done when there is inflammatory back pain, and HLA-B27 is checked for prognosis.
How is Enteropathic Arthritis treated?
Treatment is coordinated with gastroenterology, because several medicines help both organs and some help one at the expense of the other.
Non-steroidal anti-inflammatories relieve joint pain but can flare bowel disease, so they are used cautiously and briefly. Sulfasalazine helps peripheral joints and colonic disease. Methotrexate and azathioprine are used for both.
TNF inhibitors are highly effective across bowel, peripheral joints and spine, and are the usual choice where all are active. Interleukin-12/23 blockade is another option. Some drugs used for the joints in other spondyloarthritis — notably interleukin-17 inhibitors — can worsen bowel disease and are avoided here.
Large-joint flares that track with the bowel often settle when the bowel disease is brought under control.
Living with Enteropathic Arthritis
Peripheral arthritis that mirrors bowel activity usually improves when the gut is controlled. Spinal disease follows its own course and needs its own treatment. Bone density is monitored, since IBD, steroid use and malabsorption all reduce it.
When should you see a rheumatologist?
Anyone with inflammatory bowel disease who develops joint swelling, heel pain or morning back stiffness should be assessed, and any arthritis accompanied by chronic diarrhoea or blood in the stool needs bowel investigation.
Common questions about Enteropathic Arthritis
Can joint pain be the first sign of inflammatory bowel disease?
Yes. Arthritis, mouth ulcers, eye inflammation or skin nodules sometimes appear before bowel symptoms. Persistent joint symptoms with diarrhoea, blood in the stool, weight loss or anaemia warrant a bowel assessment.
Will controlling my bowel disease fix my joints?
Often, for large-joint arthritis that flares alongside the bowel. Spinal involvement and small-joint disease tend to run independently and need their own treatment.
Are painkillers safe if I have IBD?
Non-steroidal anti-inflammatories can trigger a bowel flare, so they are used briefly and cautiously, if at all. Paracetamol, local injections and disease-modifying treatment are preferred.
This page is general information to support a consultation. It is not a diagnosis, and it does not replace an assessment by a doctor who has examined you.