Dermatitis herpetiformis (DH) is a skin condition that is related to coeliac disease. It causes an itchy rash that is made up of raised, red bumps or blisters. The rash usually appears on the elbows, knees, buttocks, lower back, and the back of the neck.
DH is caused by an immune system reaction to gluten, a protein found in wheat, rye, and barley. When people with DH eat foods that contain gluten, their immune system becomes overactive and produces an antibody called immunoglobulin A (IgA). This antibody then triggers an inflammatory response in the skin, leading to the rash.
The only way to treat DH is to follow a strict gluten-free diet. This means avoiding foods that contain wheat, rye, and barley. It is also important to read food labels carefully and to avoid cross-contamination from foods that contain gluten.
If DH is not treated, it can cause severe skin damage and lead to other health problems. Therefore, it is important to see a doctor if you think you may have DH. Your doctor can diagnose DH and help you find the right treatment plan to help you manage the condition. With a gluten-free diet and proper treatment, DH can be managed and the rash can go away.