Holy crap, I'm being eaten by ants!

Woke up this morning with dozens of insect bites. Mosquitos, I'd assumed. Then today I was sitting on the couch, felt something weird, looked down -- my foot and ankle were black with hundreds of itty-bitty ants hauling away my flesh one tiny bite at a time. So the tropics have a dark side. Who knew? Any suggestions? Seriously, I'm afraid to fall asleep.