Our final treatment is one many people would expect for an illness, but one that only works so well against viruses.
As we've said, cold sores are cause by HSV-1, a virus. Viruses typically stay with the host (that'd be the human) for the rest of their lives.
But thanks to advances in medicine, some antiviral medications can force a virus back into dormancy. For people suffering cold sores, those include acyclovir, valacyclovir, famciclovir and penciclovir [source: Mayo Clinic].
For more on cold sores, see the next page for a host of information.