What should you know about celiac skin rash?

Dermatitis herpetiformis is the characteristic skin condition associated with coeliac disease. It may produce groups of tiny red bumps or blisters, followed by crusting from scratching, and often appears in a fairly symmetrical pattern. Common sites include elbows, knees, buttocks, and scalp, though other areas can be involved. A general rash can instead be [Atopic Dermatitis](/conditions/atopic-dermatitis/), [Contact Dermatitis](/conditions/contact-dermatitis/), a medicine reaction, or an infection.

Skin findings do not show whether coeliac disease is present throughout the digestive system. A clinician may combine an examination with blood testing and, when needed, a skin biopsy. Keep a note of bowel changes, bloating, fatigue, mouth ulcers, or weight change to discuss at the visit.

Make an appointment when the rash is persistent, recurrent, severely itchy, or leaving sores. Do not remove gluten before receiving advice about testing, since dietary change can make coeliac investigations harder to interpret. Until reviewed, use fragrance-free moisturiser, lukewarm water, soft clothing, and clean nails; avoid scratching and adding multiple over-the-counter products. A confirmed diagnosis may require coordinated skin and gastrointestinal care.

Get emergency help for difficulty breathing, throat or tongue swelling, faintness, or a rapidly spreading rash with systemic symptoms. Seek prompt medical care for fever, painful skin, pus, extensive blistering, eye or mouth involvement, or rapidly worsening redness.

Ask whether the rash resembles dermatitis herpetiformis, which tests are needed, whether you should continue eating gluten until testing, and how to relieve itching without changing the skin findings.