Dab alcohol on it as soon as you feel it coming on. Isopropyl wipes are best.
Then when it gets established, powder it with a combo of bicarb and cornflour as many times a day as you can handle.
Then, when it's in its departing phase, use a non-petroleum pawpaw ointment.

And yep, Lysine is an ace preventer. I have gone waaay more than one year without one, even though I stopped taking it when I got pg.