过敏反应又称超敏反应或变态反应,是指机体受同一抗原物质再次刺激后产生的一种异常或病理性免疫反应。过敏性疾病的发病率大约占人口的20%,从新生儿到中老年人各年龄段都有可能发生,没有明显的性别倾向,但有明显的遗传性倾向。速发型过敏反应是一种常见的过敏反应,主要为呼吸道过敏反应、消化道过敏反应、皮肤过敏反应以及过敏性休克。 Anaphylaxis, also known as hypersensitivity or allergy, is an abnormal or pathological immune response produced by the body re-stimulated by the same antigen. The incidence of allergic diseases accounts for about 20% of the population, from newborns to the elderly may occur at all ages, there is no obvious gender tendency, but there is a clear genetic tendency. Hypersensitivity hypersensitivity reaction is a common allergic reaction, mainly respiratory allergies, gastrointestinal allergies, skin allergies and anaphylactic shock.