Answer:
When I am caught, I am thrown away. When I escape, you itch all day. What am I?
You will always find me in the past. I can be created in the present, but the future can never taint me. What am I?
I am pronounced as one letter written with three. I come in blue black brown or grey. Reverse me and I read the same either way.
I am there when you sit, but gone when you stand. What am I?
Crooked as a rainbow and slick as a plate ten thousand horses can't pull me straight.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?