What’s so bad about allergens that your body would rather kill you than let them enter?

Question

I know allergies are really common, but I don’t quite understand what’s so bad about pollen, peanuts, etc. that you body would rather shut down your airways entirely than let them enter. What exactly would happen if they did get in?

In: 115

Answer 1

I’ve noticed some allergies in my family being related to influenza or others that cause fevers. As an adult my Dad became allergic to his male cat while having the flu for 3 weeks. My son became allergic to ibuprofen around 5 years. I became allergic to rats after working with them for 3 years. Some but not all allergies may be from a novel chemical in your body during infection and immune programming.

In each case above I know there was a fever involved.