Answer:
While you were folding a letter you got me. Usually you will do whatever it takes to avoid me but now you can't help but find me.
An action done on mosquito bites
I am perfect with a head perfect without a head; Perfect with a tail perfect without a tail; Perfect with either neither or both.
You can drop me from the tallest building and Iβll be fine, but if you drop me in water I die. What am I?
I grow up while growing down
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?