So my illness could be down to:
Milk, Cheese, Egg, protein, wheat, cereals, peas, oranges, fish, chicken, nuts, chocolate, natural and synthetic additives, artificially flavoured articles, alcohol, pollen, dust, heat, fungi, antibiotics, cocaine, heroin, insect bites, fungal infection, deodorant, perfume, cosmetic products, washing powder, stress or just to cover anything else, it could be “idiopathic” – unknown.
Great, that’s useful, really narrows it down.