How does an allergic reaction take place? Simply put, after a person with an allergy comes into contact with an allergen (allergic stimulant) in the environment, the body displays a sensitivity to it.
簡單地說，有過敏體質的人，接觸了環境中的刺激因素﹘﹘過敏原後，身體產生過度敏感的反應，稱之為過敏。