My left thumb started out 2 days ago with a tiny black dot in the middle on the interior, and has since become swollen, very painful and throbing, as well as blistering to the point I had to pierce the blister in several places to get any relief! The fluid leaking from the blister is clear, with a reddish tint. Now my thumb is very fevered, and purple on the pad part, and turning red on the trunk.