Coeliac disease is caused by a reaction of the immune system to gluten. The symptoms include:

• bloating
• diarrhoea
• wind
• constipation
• nausea
• tiredness
• mouth ulcers
• sudden weight loss
• anaemia
• osteoporosis.

Once diagnosed, it is treated by following a gluten free diet. Dermatitis herpetiformis is the skin manifestation of coeliac disease.