ELI5 how are some allergies worse than others?

r/

I know that allergies are your immune system overreacting to foreign bodies, but why is the reaction more or less extreme depending on what you’re exposed to?

What is it that makes some allergies mild, while some can be fatal?

Comments

  1. Eerie_Academic Avatar

    It depends how severe the immune system reacts and also where in the body!

    I have a lethal allergy that comes without strong reactions, it’s just in a bad place (intestines) where it can cause organ damage even with a weak response