Answer:
I do not contain flesh feather or scales; yet I have fingers and thumbs.
If a man carries my burden they will get crushed to death. Though not rich I leave silver in my track.
When I am caught I am thrown away. When I escape you itch all day.
I am always hungry, I must always be fed. The finger I lick will soon turn red. What am I?
I am found in the sea and on land but I do not walk or swim. I travel by foot but I am toeless. No matter where I go, I am never far from home. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.