Atomic Particle Colloidal Silver 4000 PPM should do the trick try rubbing onto your skin.
I had a nasty spider bite, the infection quickly grew to a sore mound, I rubbed the 4000 PPM CS on it 3 time in 1/2 hour increments and the infection disappeared
within a few hours.
Atomic particles can penetrate right through your skin and into the infection very quickly.