Bronchial asthma is the most frequent chronic disease of childhood. The association of this disease with allergic rhinitis increases the prevalence and severity of bronchial asthma to 60% compared with 2% in subjects without allergic rhinitis. Food allergy can be expressed in a variety of respiratory symptoms, especially when IgE mediated immune responses are involved. In children, the prevalence of bronchial asthma associated with food induced atopic eczema is 2-8% and respiratory clinical picture can be a component of the multisystem anaphylactic reaction or of chronic respiratory disease like bronchial asthma, serous otitis. The association of other allergic comorbidities, like sinusitis, ocular allergies, lymphoid hypertrophy, sleep obstructive apnoea, leads to the conclusion that allergic bronchial asthma (extrinsic) is a systemic disease, with onset at any age, and the dominant clinical feature depends on the child's genetic pattern.