Black and yellow salves are sometimes referred to as botanical surgery. The salve is a thick paste made of native American herbs, with the main herbal component being the blood root. The salves are applied topically over areas of diagnosed or suspected malignancy, and they are selective in their action so they will only “go after” neoplastic (cancerous) tissue, though healthy tissue may become slightly reddened and mildly irritated when the black salve is applied.
Who knew? If emergency occurs... While the blood is gushing - hold pressure and crack open an egg. Peel that membrane off and put it on the wound (continue holding pressure) The membrane will harden and keep the wound closed until you can get to the ER for stitches