I was bitten by a wasp about 2 months ago the bite still itches and swells at time what should it do?

Retained stinger?: Wasps and their relatives (bees, yellow jackets, hornets) don't bite; they sting. Regardless, you wouldn't ordinarily have symptoms 2 months later! You might have a retained stinger, a splinter or another foreign body in the wound. Or it may have become infected. In any case, this should be checked out by a medical professional.

Wasp Sting: Go to doctor, get treated with oral steroids to treat allergic reaction to wasp bite.