The large, hairy leaf of comfrey, mashed warm into a poultice and bound over a sprain, bruise, slow-healing wound, or aching joint. One of the most famous topical healing herbs of the Southern and Appalachian tradition — earned the name 'knitbone' — and one that must NOT be eaten.
Comfrey grew in countless Southern and Appalachian gardens as the family's first aid for a turned ankle or a bad bruise. The knowledge of how to mash and bind it — and, eventually, the hard-won wisdom that it must stay on the skin — is part of the practical injury knowledge that traveled with these families.
Comfrey's topical healing power is real and well-documented. Its key compound allantoin stimulates cell proliferation and tissue repair, speeding the healing of sprains, bruises, wounds, and the 'knitting' of soft tissue around injuries — modern trials of comfrey creams confirm reduced pain and faster recovery in ankle sprains and back pain. Rosmarinic acid adds anti-inflammatory and analgesic action, and the mucilage soothes and protects the skin. BUT comfrey also contains pyrrolizidine alkaloids that are hepatotoxic and carcinogenic when absorbed internally — which is why the entire tradition of comfrey as food and tea has rightly been abandoned in favor of strictly topical, short-term use on unbroken skin.
Topical use only. Bruise or chop fresh comfrey leaves, warm them slightly, and apply as a poultice over the injured area, covered with a cloth, for an hour or so; or use a commercial comfrey salve. Apply to intact (unbroken) skin only and for limited periods. Wash hands after. Never make it into tea or eat the leaf or root.
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