Most likely it is scabies. Could also be some sort of allergic
reaction, such as hives. (Have you been petting a cat, and are you
allergic to cats? Just an example.) See what happens if you take
some Benadryl or apply some Caladryl lotion. Unless, of course,
you've been exposed to poison ivy or poison oak. (Keep your fingers
away from your eyes.)
You might ask your pharmacist for a recommendation. Best of all
would be to see a dermatologst (skin doctor).