If dust is made up of your own dead skin, how can you be allergic to it?

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If dust is made up of your own dead skin, how can you be allergic to it?

In: Biology

Your dead skin is *one thing that is in* dust. There are other things. Plant pollens can make up a large portion of the dust, even in your house.

Besides, feeding on that dead skin are a bunch of little tiny beasties, themselves alive and chemically active. And the, (ahem) products of their digestion are chemically active.

All of these things can be irritants in themselves, and/or things that you have an allergic reaction to.

It’s usually the tiny dust mites that live off of the dust that we’re allergic to, not the dust itself. However allergic or not, getting dust in your nose is going to make most people sneeze out of simple agitation.

I read that it’s the dust mite poop that causes allergies. Not the dust or dust mites themselves.

Alongside the other comments, I don’t think most people are necessarily ALLERGIC to it. It just gets up in their nose hairs and tickles so they sneeze.