@croydon - Another old method that was once used to care for wounds was to coat them with honey. It would draw out the infection and help the flesh to recover without too much scarring.
They actually do use honey bandages now as well, although it's a special kind of honey I think. They use it on burn victims.
Basically the sugar content makes it impossible for bacteria to survive because it draws the water out of their cells.
I don't know if it would work on infections at home though.