When used in teas, comfrey has been found to alleviate stomach ailments, coughs, diarrhea pain, and liver and gallbladder conditions. As an external salve, comfrey ointments are effective in soothing skin irritations and promoting wound healing.
CAUTION: Comfrey contains pyrroliziidine alkaloids, compounds known to cause liver disease if taken over a long period of time. Opinions differ as to it’s safety, but because of this uncertainty I don’t recommened that it be taken internally. There are many other, much safer herbs that can be used instead, such as peppermint and ginger.I’d also suggest that salves being marketed to nursing mothers with chafed nipples be avoided, since comfrey should not be ingested by infants.