Toothpaste works good on the itch.
sw
Argentines are a menace to the native ants. The Calif. fire ant and the Calif. harvester, both of which have nasty stings, are no match for the sheer numbers of Argentines. I've seen them go against the bigger, heftier harvester, and they just rat pack them. They set up their nests in the vicinity of the harvesters or fires, and when their numbers are enough, it's all over. Argentines can survive in lower temperatures than either native species mentioned, which gives them an advantage during the winter. Their colonies also merge and work together, which other ant species don't do. Talk about unwanted aliens!!
Salt works well on fire ant bites.