Answer:
An action done on mosquito bites
I am pinched by grandmas
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. Sooner or later everybody needs my help yet many people are afraid to let me help them.
Travel a mile and I will change, travel a million and I will end as I started. What am I?
If you're looking for something sweet I know what to do. But if you don't like heat I'm not for you.
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk