Dear patient Thanks for you query If the above mentioned patient has repeated episodes of loss of consciousness which are improving with chocolate it is most probably due to hypoglycaemia, that is low blood sugar. But we need to document that first by doing blood sugar levels during the episode. If it is proven that he has decreased sugar levels then we need to thoroughly investigate him for abnormal and excessive source of insulin which is responsible for lowering sugar. There are series of test to do that for which consultation with endocrinologist is essential