what are allergies?

[jEct2]

i know what an allergy is but what causes them?
why does our body reacte differently to such random things?
from something as common as being allergic to poison ivy (90% of the population is)
to having a copper allergy...

 

[Nikamichi]

Enviromental pollution causes allergies.

 

[spidey07]

short answer...

Body says "I want you out, and I want you out now"

google "histamine"

 

[giantpinkbunnyhead]

IS THERE A DOCTOR IN THE HOUSE?!?

 

[God On Alcohol]

Google is the way to go my friend...