How can allergic reactions be triggered?

Answer:
Well a allergic reaction can be triggered depending on what you are alergic to and how bad.It can be triggered by smell touch or eating it thats why you should always have a epipen.For example I am allergic to peanut butter if I ate it I would get big hives and probably wouldn't be able to breath someone or myself would have to give me my epipen.
First answer by ID2926792975. Last edit by ID2926792975. Question popularity: 4 [recommend question].