Coeliac (pronounced ‘see-liac’) disease is a lifelong autoimmune disease caused by intolerance to gluten which is a protein found in wheat and related grains, including barley and rye. This condition effects about 1 in 100 people. Symptoms include bloating, diarrhoea, nausea, wind, constipation, tiredness, headaches, sudden or unexpected weight loss (but not in all cases), hair loss and anaemia. Dermatitis herpetiformis is the skin manifestation of coeliac disease.
The condition is treated by following a gluten-free diet. Read more about coeliac disease at Coeliac UK.