Allergic diseases are closely related to age. As children grow older, the manifestations of allergic diseases change in stages, and the phenomenon of the continuous appearance of different allergic symptoms in various systems is known as the “natural course of allergy”; that is, food allergies first appear at birth, followed quickly by atopic dermatitis (infantile eczema The incidence of allergic rhinitis and asthma increases with age. A proportion of children presenting with food allergy, dermatitis, rhinitis and asthma all in one is also considered: allergy, a single disease with multiple clinical manifestations. Because they are both allergic diseases mediated by IgE, they share the same allergens, similar genetic factors, similar pathological manifestations and similar incidence. What are the symptoms of both allergic rhinitis and asthma? Such as waking up early in the morning with nasal congestion, nasal itching, sneezing, usually like to pick the nose and rub the eyes, unexplained cough at night or early in the morning, coughing during the day after exercise or after crying or laughing, throat clearing and throat itching after eating stimulating food or after inhaling cold air, nasal and throat discomfort after contact with dust, pollen, animal fur, having to cough for a long time after a cold or pneumonia, sudden wheezing or cold accompanied by wheezing, chest tightness, breath-holding, etc. These symptoms are more frequent at the change of seasons. Food allergy is usually the first step in the allergy process, and stopping the first step in the allergy process is likely to reduce the onset of allergic diseases later. It is important to firmly achieve allergen avoidance, properly recognize and treat allergic reactions, achieve early treatment, maintain normal growth and development, and actively control asthma and rhinitis. Early treatment of allergic rhinitis may help prevent the occurrence of asthma or reduce the severity of lower respiratory tract symptoms. Food allergy induced rhinitis and asthma should not be ignored and should be diagnosed, treated and prevented at an early stage.