I've used myrrh to promote a healthy pussing response from mucous membranes. I took it both as a tincture and in a salve (Healing Salve from WishGarden in Boulder, CO or Herbal Savvy from Country Comfort, I think). Many of the salves contain a complex of herbs that are helpful.
I've also used colloidal silver both topically in ointments and salves, as well as internally. (I buy it from iHerb.com. If you are a first-time customer, you can use my code: LIN301 for $5 off your first order.)
You can also use Echinacea, Goldenseal, and other herbs internally as tinctures or other forms.
You can buy homeopathic staph. We've used it with success for boils.