How does a cure for furunculosis?

As a most spreading cure are bandages with ichtiolum ointment till his softening, changing bandage for two times/day.
As of herbs use herb sage, leaves birch, nettle, as two tbl.sp. add in two glasses for hot water, infuse for hour, filter, use for three times/day, but if nidus is deep having as in subcutaneous cellulose, thus surgeries will open his, and check sugar test level on diabetes display.