i fyoucan get soem fresh sage it is best.
if not use dried..
just lightly crush a small bi tof sage and add a small amt of oiliv eoil to it to help it stick.
apply it like a littel paste to the cold sores directly on them
and refresh your paste with new several time sitn eh day/
at night might use a small bandage to hold it agains tthe sore i t should heal preety fast.
also can take a green tea bag and get it pur hot water ove rit and wet teabag/ and apply as a poultice pad to teh sore
about 10 minutes 3tiem sa day.. the tannic acid in it will fight the staph. in the cold sore.