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Drying up a cold sore
Once you have a cold sore they can linger for many days. Just sitting there on your lip, glowing! It is probably too late to try the tips on this page so what you want to try and do is get the sore to dry out and heal as fast as possible.
I have had the following tip sent to me that will actually dry up the sore. Making it heal in 2 to 3 days. It is advised that you be a little strong, as there can be a rather intense stinging.
Grind some table salt with the back of a teaspoon. Moisten your index finger & dip it in the powdered salt. Press the powder into the cold sore & hold it there for 30 seconds. Don't rinse. It will be quite uncomfortable but if done twice a day for 2 - 3 days, the sore will dry up.