Other forms: itchily
If you're itchy, you've got a rash or a spot on your skin that you really want to scratch. Mosquito bites are notoriously itchy, and the least fun thing about summer time.
Poison ivy, hives, bug bites, sunburn, lice — all of these things make you itchy, and it might even make you feel itchy just to think about them. A figurative way to be itchy is to be antsy or restless, and if someone has "itchy feet," it means they like to roam or travel, staying on the move. If, on the other hand, they have "itchy palms," they can't be trusted not to steal things.