Are my joint, eye and skin problems related to my IBD?
They often are. IBD is a condition of the whole immune system, not only the gut, so it can show up in other parts of the body. The most common places are the joints, the eyes and the skin. These outside symptoms frequently appear during a flare and tend to settle as the gut inflammation is treated, though they can sometimes turn up before any gut symptoms. Most are manageable, but some need prompt attention, eye inflammation in particular, because a few eye conditions can threaten vision if they are not treated. It is always worth telling your IBD team about new joint, eye or skin problems so they can connect the dots.
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If your knees ache, your eyes feel sore, or a tender rash appears on your shins around the same time as your gut acts up, it may not be a coincidence. IBD is an immune-mediated condition, so its effects are not always limited to the bowel.
The gut is not the only place IBD shows up
These are called extraintestinal symptoms, meaning "outside the gut." Cleveland Clinic lists out-of-gut features including "eye pain and irritation," "swollen joints," "skin sores and rashes," and "mouth sores" (Cleveland Clinic). Crohn's & Colitis UK notes that "up to 1 in every 2 people with Crohn's develop problems in other parts of the body," most often the joints, eyes and skin (Crohn's & Colitis UK).
The three common areas
- Joints. "Joint pain or swelling is common," and "for some, this will get worse during a flare-up, but will usually improve with treatment" (Crohn's & Colitis UK).
- Eyes. Mild episcleritis "tends to flare up at the same time as Crohn's symptoms," but uveitis and scleritis "are serious and can lead to loss of vision if they're not treated" (Crohn's & Colitis UK). New eye pain or vision changes are worth checking quickly.
- Skin. Conditions such as erythema nodosum, tender red lumps usually on the shins, "usually occurs during flare-ups and usually improves with treatment" (Crohn's & Colitis UK).
Why it matters to mention them
These symptoms "usually happen during a flare-up, but can occur without or before any gut symptoms" (Crohn's & Colitis UK). Telling your team about them helps in two ways: it can explain symptoms you had not linked to IBD, and a new joint, skin or eye problem can be an early hint that the disease is becoming active.
- Mention new joint, eye or skin symptoms to your IBD team, even if your gut feels settled.
- Treat sudden eye pain or vision changes as urgent.