Answer:
When I am caught, I am thrown away. When I escape, you itch all day. What am I?
When you need me, you must find me. When you find me, you no longer need me. What am I?
The more you take away from me the bigger I shall get.
I am an odd number. Take away one letter and I become even. What number am I?
Everyone asks for me but yet everyone hates to face me. For someone I am agony for others I am relief. Who am I?
No matter how little or how much you use me, you change me every month.