Answer:
What force and strength cannot get through I with my unique teeth can do.
If you lose me you may cause people around you to lose me too.
When I am caught I am thrown away. When I escape you itch all day.
I am a daily ritual involving using a metal tool on the body
What can fill a room but takes up no space?
The answer I give is yes, but what I mean is no. What was the question?