What should you know about celiac rash on scalp?

Dermatitis herpetiformis is an intensely itchy immune-related eruption linked with coeliac disease. It may form small grouped bumps or blisters and can be scratched until crusted. Scalp involvement is possible, while dandruff, seborrhoeic dermatitis, psoriasis, contact allergy, folliculitis, and ringworm are also common explanations for scalp scaling or bumps. [Psoriasis](/conditions/psoriasis/) and [Ringworm](/conditions/ringworm/) describe two alternatives.

A clinician may inspect the scalp, hair shafts, and nearby skin, then ask about itching, digestive symptoms, medicines, and family history. If coeliac disease is being considered, ask about testing before making major dietary changes.

Arrange review for a rash that lasts, repeatedly flares, causes hair loss, or does not respond to ordinary scalp care. Use a gentle shampoo, avoid scratching and fragranced products, and do not share combs, hats, or towels until an infection has been excluded. Record the timing of flares and photograph the scalp if the rash changes. Treatment depends on the diagnosis and may require a prescription.

Seek urgent care for breathing trouble, swelling of the face or mouth, faintness, or a rapidly spreading allergic-looking rash. Contact a clinician promptly for painful swelling, pus, fever, tender lymph nodes, sudden patchy hair loss, or a scalp eruption spreading quickly.

Ask which scalp conditions fit the pattern, whether a skin sample or coeliac blood tests are appropriate, and which shampoo or medicine will not obscure the examination. Mention any digestive symptoms or close relatives with coeliac disease.