Answer:
Although I may have eyes I cannot see. I have a round brown face with lots of acne.
I wiggle and cannot see; sometimes underground and sometimes on a tree. I really don't want to be on a hook and I become a person when combined with βbookβ.
I am a creature with a βtightβ name.
What goes up and down stairs without moving?
I begin with the letter βiβ, if you add βaβ in front of me, I become a new word with a different meaning, but still sounds exactly the same. What word am I?
No matter how little or how much you use me, you change me every month.