Then soak a clean cloth in the liquid and apply it as a compress on the wound. Calendula may be even more effective in creams. You can buy commercial skin treatment products containing calendula in many health food stores. This herb contains a compound, allantoin, that helps heal wounds. Its astringent tannic acids may also contribute to wound healing.
Many authorities warn against ingesting it.
But there's little if any risk in applying comfrey externally. It's still my first line of defense against sores that are slow to heal. To use it, you can take some fresh leaves and rub them directly on the affected area. You can also find commercial skin-care products containing comfrey in many health food stores. Echinacea has potent immune-stimulating properties that help the body heal wounds.