Small lump on the top of my big toe, green in color and it's only been there for about a week and it's also painful to the touch. any ideas what it is?

No: Impossible to give advice without an exam Please call your DR and get this done.

The color of bruise.: Let's see, a small lump that has been there for about a week and is painful to touch. the color green just so happens to also be the color of a resolving bruise, as it goes from black/blue through green to yellow. I'm putting my money on the results of a resolving bruise secondary to a subtle injury to the top of the toe.