Samples of skin taken from the area with the rash don't always give an accurate result. ![]() What is involved in a skin biopsy?ĭuring this test, a specialist skin doctor called a dermatologist will take a small sample of skin from an area without the rash. A skin biopsy is a procedure where a sample of skin is removed to be tested. Diagnosing d ermatitis herpetiformis (DH)Ī diagnosis of DH is confirmed by a skin test called a skin biopsy. This reaction causes a skin rash to develop. Causes of d ermatitis herpetiformis (DH)ĭH is caused by the body's immune system reacting to a protein called gluten in foods containing wheat, barley and rye. Just over half (60%) of people with DH don't have gut symptoms. Most people with DH will have the same kind of gut damage seen with coeliac disease, but may not complain of gut symptoms like:
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