What do you mean by allergic reaction? Allergic reaction is an allergic reaction. Why is it called allergic reaction? It is a term introduced from abroad 50 years ago in China and has no other meaning. But it is easy to cause people’s misconceptions. What kind of diseases are seen in allergic reactions? (including respiratory medicine, rhinology, dermatology, pediatrics, immunology) 1, treatment of asthma, especially allergic asthma. 2.Allergic rhinitis. 3, skin allergy, urticaria, atopic dermatitis, allergic purple, psoriasis. 4.Immunological disease Easy to catch a cold, chronic bronchitis, relapse.