You've been bloated, tired, and run-down for months, maybe with stretches of diarrhea or constipation you can't explain. Or perhaps it's an intensely itchy rash that won't quit. It's easy to brush these off as stress or a sensitive stomach, but they can be the body's way of flagging celiac disease, an immune reaction to gluten that quietly damages the gut.
Celiac disease symptoms are notoriously varied. Some people have classic digestive trouble, others have a telltale skin rash, and many have subtle signs like fatigue or anemia with no stomach complaints at all. Here's what to look for and when it's worth getting tested.
What is celiac disease?
Celiac disease is an autoimmune condition in which eating gluten, a protein in wheat, barley, and rye, triggers the immune system to attack the lining of the small intestine. Over time this damage impairs the gut's ability to absorb nutrients, which is why symptoms can show up far beyond the digestive tract.
It is more common than many people realize. A 2018 meta-analysis found a pooled global prevalence of about 1.4% by antibody (serologic) testing and 0.7% by intestinal biopsy, with higher rates in women and children. In the U.S., an estimated 1 in 133 people has celiac disease. Importantly, presentation varies widely from person to person, so two people with the same diagnosis can look very different.
What are the most common digestive symptoms?
The classic signs of celiac disease involve the gut, and they tend to be more common and obvious in children than in adults. If you regularly feel bloated and uncomfortable after meals, or your bowel habits have shifted without a clear reason, that pattern is worth paying attention to.
Common digestive symptoms include:
- Bloating and abdominal discomfort or pain
- Diarrhea, constipation, or alternating between the two
- Unintended weight loss
- Heartburn
- Nausea or a generally upset stomach
What about symptoms outside the gut?
Many people with celiac disease have few or no digestive complaints. Because the condition interferes with nutrient absorption, it can surface in ways that seem unrelated to the stomach, which is part of why it's so often missed.
Non-digestive symptoms can include:
- Fatigue and iron deficiency anemia
- Headaches
- Joint pain
- Peripheral neuropathy: persistent tingling, numbness, or pain in the hands and feet
- Mouth problems like canker sores, dry mouth, or a red, smooth, shiny tongue
- Reproductive issues such as infertility, missed or delayed periods, and repeated miscarriages
- Over time and if left untreated, damage to the bones, nervous system, brain, liver, and other organs
The skin connection: dermatitis herpetiformis
Celiac disease has a distinctive skin form called dermatitis herpetiformis (DH). It shows up as an intensely itchy, symmetrical, blistering rash, with small vesicles often 3 to 5 millimeters across on reddened skin. Because the itch is so severe, the blisters are frequently scratched open and left eroded or crusted.
DH favors the extensor surfaces of the body. The 'herpetiformis' in the name refers to the herpes-like clustering of blisters, not a viral infection. Common locations include:
- Elbows and knees
- Buttocks
- Lower back
- Scalp
How are celiac disease and DH related?
Dermatitis herpetiformis is essentially celiac disease showing up on the skin. It's caused by IgA antibodies depositing in the skin against an enzyme called epidermal transglutaminase, and it shares the same HLA-DQ2 and HLA-DQ8 genetic background as intestinal celiac disease.
About 10% of people with celiac disease develop DH, while more than 90% of people with DH also have gluten-sensitive enteropathy, the gut damage of celiac disease, even if their digestive symptoms are mild or absent. DH has a population prevalence of roughly 10 per 100,000, with a mean age of onset around 50 and a slight predominance in men. A skin biopsy with direct immunofluorescence, which looks for granular IgA deposits in the skin, confirms the diagnosis. Both the gut and skin disease improve on a strict gluten-free diet, and symptoms can return when gluten is reintroduced.
When should you see a doctor?
See a clinician if you have ongoing digestive symptoms, an unexplained itchy blistering rash, persistent fatigue, anemia, or numbness and tingling in your hands and feet. These are worth investigating rather than waiting out, especially if a close relative has celiac disease.
One key point: don't cut gluten out before testing. Celiac testing relies on your immune response to gluten, so going gluten-free first can mask the disease and lead to a false-negative result. Ask your doctor about testing while you're still eating gluten. If you're navigating a stubborn, itchy rash or unexplained skin changes, a clinician-guided plan, like the personalized support Nolla offers, can help you connect the dots and decide on next steps.
Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before starting any new skincare treatment, especially if you have underlying health conditions, are pregnant, or are taking medications.
