Definition of "itch"

... it left, however, a bee at his ear and an itch to transfer the buzzer's attentions and tease his darling; for she had betrayed herself as right good game.

1895, George Meredith, The Amazing Marriage

Capulet: ... Speak not, reply not, do not answer me; / My fingers itch. Wife, we scarce thought us blest / That God had lent us but this only child; / But now I see this one is one too much, / And that we have a curse in having her: / Out on her, hilding!

c. 1591–1595 (date written), William Shakespeare, “The Tragedie of Romeo and Ivliet”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, (please specify the scene number in lowercase Roman numerals)]

My head is suddenly itching me like mad.

2001, India Knight, My Life on a Plate, page 102

"What makes you suspect him?" Max asked as he itched his neck.

2002, M D Huddleston, Missing Paige

I have to take both shoes and socks off! If I go bare foot I'm ok! I also get itching on my r/palm of my hand. I itch it so much that it's raw!

2002 January 4, Cyd, “Itching”, in alt.support.mult-sclerosis (Usenet)

Basically I go through a half hour of trying to figure out of it is an fake OCD itch or a regular itch before I itch it (if I determine it's a "fake" itch, then I try not to itch it).

2003 November 21, Jim Patterson, “Behavior Therapy for Itchy Clothes?”, in alt.support.ocd (Usenet)

Ulysses thumped his side and itched his back side, then slipped into his car.

2003, Ray Emerson, The Riddle of Cthulhu

But when we asked more about the famous man whose specter still commanded the heights, the guard just sneered at me, pointed his gun back toward the road with one hand, and itched his chin with the other.

2004, Philip Smucker, Al Qaeda's Great Escape: The Military and the Media on Terror's Trail