Recognizing Symptoms of Celiac Disease and Gluten Sensitivity

Last reviewed: 2026-07-14

The Symptoms Are Not What Most People Expect

Celiac disease is routinely missed for years, and the reason is simple: it does not look the same in any two people. More than 200 symptoms have been associated with it.

Some people have the classic digestive picture. Others arrive at a diagnosis through something that appears to have nothing to do with the gut — exhaustion, unexplained anemia, a rash, difficulty conceiving.

And some people have no symptoms at all.

If any of this sounds familiar, do not stop eating gluten yet.

The tests for celiac disease only work while gluten is still in your diet. Going gluten-free before you are tested produces false negatives and can cost you a diagnosis. Get tested first, then change your diet.

Digestive Symptoms

The symptoms most people associate with celiac disease. They are more common in children than in adults.

• Chronic diarrhea or loose stools — often frequent, pale, foul-smelling, or fatty
• Constipation — less discussed, but it happens, and it is more common in children
• Bloating and gas — commonly after meals containing gluten
• Abdominal pain — persistent cramping or discomfort
• Nausea, sometimes with vomiting
• Unexplained weight loss — where malabsorption is significant

Many adults with confirmed celiac disease have few gut symptoms, or none.

Symptoms That Do Not Look Like a Gut Problem

When the small intestine is damaged, it stops absorbing nutrients properly, and the consequences surface all over the body. A large number of adults reach a celiac diagnosis through a symptom that seems entirely unrelated to digestion.

• Persistent fatigue — exhaustion that is not explained by how much you slept
• Iron-deficiency anemia — one of the most common routes to a celiac diagnosis in adults, caused by the gut's failure to absorb iron
• Bone problems — bone pain, low bone density, or unexplained fractures, from poor calcium and vitamin D absorption
• Neurological symptoms — headaches, migraine, brain fog, and peripheral neuropathy: tingling or numbness in the hands and feet
• Depression and anxiety — people with celiac disease show meaningfully higher rates of both. A 2024 meta-analysis found roughly two- to threefold increased odds, and found that a gluten-free diet is associated with reduced symptom levels. The relationship is not fully understood, but it is well documented.
• Mouth problems — recurrent canker sores, dry mouth, or a smooth, shiny tongue
• Reproductive problems — unexplained infertility in both women and men, repeated miscarriage, periods that start late or stop
• Dermatitis herpetiformis — an intensely itchy, blistering rash, usually on the elbows, knees, buttocks or scalp. It is the skin manifestation of celiac disease. Among people with untreated celiac disease, it affects roughly 10–20% of adults and 2–3% of children. Some people have the rash and no digestive symptoms at all.

The Ones With No Symptoms at All

There is a form of celiac disease sometimes called silent, or asymptomatic. People with it feel entirely well. Their intestine is being damaged anyway.

This is the part worth sitting with: how bad you feel is not a measure of how much damage is being done. Someone with severe villous atrophy can have no complaints, while someone with mild damage feels terrible.

Everyone with celiac disease carries the same long-term risks — bone loss, nutrient deficiency, and the rest — whether or not they have a single symptom. This is why a lack of symptoms is not a good reason to skip testing, particularly if celiac disease runs in your family.

Symptoms in Children

Children, especially younger ones, often present differently:

• Failure to thrive — poor growth or short stature
• A swollen abdomen — often alongside chronic diarrhea
• Enamel damage — defects or discoloration on developing teeth
• Delayed puberty
• Behavior changes — irritability, mood changes

As children move into their teens, the picture starts to look more like an adult's, and digestive symptoms may not be the most prominent sign.

What About Gluten Sensitivity?

In non-celiac gluten sensitivity (NCGS), the symptoms overlap heavily with celiac disease: bloating, abdominal discomfort, diarrhea, fatigue, headaches. Some people also report joint pain, skin problems, or changes in mood.

The difference is underneath:

• No intestinal damage. The villi are not attacked.
• No specific markers. There is no antibody or genetic test that identifies NCGS.
• Diagnosed by exclusion. Because symptoms alone cannot separate the two, NCGS can only be identified after celiac disease and wheat allergy have been formally ruled out.

That last point is the practical one, and it leads back to the same place: you have to be tested, and you have to still be eating gluten when you are.

When to See a Doctor

If several of these sound like you — particularly if they have been going on for a while, or are affecting your life — take it to a doctor.

Two things to know before that appointment:

• Keep eating gluten until testing is complete. Both the blood test and the biopsy depend on it. This is the most common mistake people make, and the most costly.
• These symptoms overlap with other conditions — irritable bowel syndrome, inflammatory bowel disease and thyroid disorders among them. A doctor can tell them apart. A symptom list cannot.

Related Articles

• Getting Tested for Celiac Disease
• Celiac Disease vs. Gluten Sensitivity vs. Wheat Allergy
• Back to Gluten-Free Guide

Sources

• Celiac Disease Foundation. Symptoms of Celiac Disease. https://celiac.org/about-celiac-disease/symptoms-of-celiac-disease/ — accessed 14 July 2026
• NIDDK / National Institutes of Health. Symptoms & Causes of Celiac Disease. https://www.niddk.nih.gov/health-information/digestive-diseases/celiac-disease/symptoms-causes — accessed 14 July 2026
• Beyond Celiac. Celiac Disease Symptoms. https://www.beyondceliac.org/celiac-disease/symptoms/ — accessed 14 July 2026
• Merck Manual (Professional Edition). Dermatitis Herpetiformis. https://www.merckmanuals.com/professional/dermatologic-disorders/bullous-diseases/dermatitis-herpetiformis — accessed 14 July 2026
• Moawad MHE et al. Anxiety and Depression in Patients With Celiac Disease. Psychiatric Research and Clinical Practice, 2024. https://psychiatryonline.org/doi/10.1176/appi.prcp.20230076 — accessed 14 July 2026