As I have been digging in my garden, I keep finding a very small, pin-head sized red bug. I do not know if it is a good bug or a pest. Can anyone help me?
Thank you.

What's That Bug:Mites (http://www.whatsthatbug.com/mites.html)

You might like to check these photographs to see if they look like the bug you saw in your garden.

A little sevin dust should cure the problem. Be sure to read the warnings and cautions on the bag.

Or if you don't use chemicals, get some ladybugs.