Allergic diseases such as allergic rhinitis and bronchial asthma belong to the most common conditions suffered by children and adolescents. In many cases, the symptoms
have a severe effect on the everyday lives of patients. Allergic rhinitis is an allergic inflammation of the nasal mucosa, and is accompanied by itchiness, sneezing attacks,
increased secretion of mucus, and impaired nasal breathing. Frequently the condition also affects the eyes. Allergens ranging from pollen, fungi, epithelial animal tissue to house
dust mites may all trigger symptoms. Bronchial asthma, in turn, is caused by a hypersensitivity of the bronchi to various compounds. This hypersensitivity causes reversible,
sudden constriction of the bronchial system that leads to coughing, shortness of breath and wheezing. Asthma in the majority of children has an allergic cause.