[Expert consensus on diagnosis, treatment and prevention of allergic diseases (Part Ⅱ)].

This article is the second part of the consensus. The principle of allergic diseases treatment is "combination of prevention and treatment, four in one":environmental control can avoid or reduce allergens, which is the first choice; allergen vaccine desensitization treatment is a cause-response treatment and has been considered as the first-line treatment; targeting drugs to block allergy or anti-allergy drugs to control symptoms is a commonly used symptomatic treatment method, which needs to be used with reference to the management of chronic diseases; Health education can change patients' misconceptions, improve their initiative and compliance, change their behavior, and improve the efficacy.