What Are the Symptoms of Coeliac Disease?
Most people picture coeliac disease as dramatic stomach pain and non-stop diarrhoea. For a lot of us, it looked nothing like that — and that mismatch is exactly why so many people spend years feeling unwell before anyone connects the dots.
Short answer
Coeliac disease is a chameleon. The classic gut symptoms appear in fewer than half of newly diagnosed adults. It can instead show up as iron-deficiency anaemia, relentless fatigue, brain fog, early bone loss, a blistering skin rash, or no obvious symptoms at all. If something has been persistently wrong, ask your GP for a tTG IgA blood test — while you are still eating gluten.
Why the “classic” picture is misleading
The textbook image — a visibly underweight person doubled over with cramps and diarrhoea — describes only a minority of cases. In adults, atypical presentations are now considered the norm rather than the exception. That single fact explains a lot of dismissed appointments: if you didn’t match the stereotype, coeliac disease may never have been on the table.
The disease is an autoimmune reaction to gluten, and the damage it does to the small intestine ripples outward into almost every system in the body. Because nutrients are absorbed in the gut, the first visible clue is often something that looks nothing like a digestive problem at all.
The signs that actually send people for testing
People are frequently diagnosed after chasing a symptom that seemed unrelated. Common triggers for testing include:
- Iron-deficiency anaemia that won’t resolve with supplements
- Unexplained fatigue or persistent brain fog
- Early or unexplained osteoporosis
- Recurrent mouth ulcers or dental enamel defects
- Migraines, tingling or numbness (peripheral neuropathy)
- A persistent, intensely itchy blistering rash — dermatitis herpetiformis
- Joint pain, or years of unexplained infertility or recurrent miscarriage
| Where it shows up | What it can look like |
|---|---|
| Gut | Diarrhoea, constipation, bloating or cramps — but often mild or absent |
| Blood | Iron-deficiency anaemia that won’t resolve |
| Bones | Early osteoporosis or low bone density |
| Skin | Dermatitis herpetiformis — an itchy, blistering rash |
| Neurological | Migraines, brain fog, tingling or numbness |
| Reproductive | Unexplained infertility or recurrent miscarriage |
| Nothing visible | Silent coeliac disease — damage without symptoms |
Silent coeliac disease: feeling fine, still affected
Silent (or asymptomatic) coeliac disease is real and well recognised. Your antibodies and biopsy show intestinal damage, but you feel well. Feeling well doesn’t mean the injury has stopped — it means your body isn’t sounding an alarm you can notice. This is one reason first-degree relatives of people with coeliac disease are sometimes tested even with no complaints. There’s more on this in our companion piece on why no symptoms doesn’t mean no damage.
When to ask for a test
The old figure for time from first symptom to diagnosis was around a decade. It is improving, but slowly. If something has been persistently wrong and no one has checked you for coeliac disease — especially if you have a first-degree relative with the condition, or another autoimmune condition such as type 1 diabetes or thyroid disease — it’s reasonable to ask your GP directly for a tTG IgA blood test. Keep eating gluten until testing is complete, or the result can come back falsely reassuring.
Coeliac UK and the Celiac Disease Foundation both publish symptom checklists worth bookmarking. Take one to your GP rather than self-diagnosing — the aim is to get properly tested, not to rule anything in or out at the kitchen table.
The bottom line
Coeliac disease rarely reads from the textbook. Fewer than half of adults get the classic gut symptoms, and some get none at all. If a persistent problem — anaemia, fatigue, bone loss, a stubborn rash — has gone unexplained, ask for a tTG IgA blood test while you’re still eating gluten, and let a clinician read the result in context.
Where to go next
- Back to every question: Coeliac Diagnosis & Medical FAQ.
- Just diagnosed? Start with Your First 90 Days with Coeliac Disease.
- Next question: How is coeliac disease diagnosed?
- Feeling fine but worried: No symptoms doesn’t mean no damage.
Sources: Coeliac UK; NICE guideline NG20 (coeliac disease: recognition, assessment and management); Celiac Disease Foundation (symptom lists). General information, not individual medical advice — discuss your own symptoms with your GP or gastroenterologist.
Last verified: 2026-07-20.
Reviewed against the HTGF methodology — every claim sourced, every listing tiered and dated. This article is practical guidance, not medical advice.
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