Definition - an uneasy irritating sensation in the upper surface of the skin usually held to result from mild stimulation of pain receptors
Itch is a word with many possible meanings, few of which are likely to be viewed as pleasant or desirable. The word may function as either a verb or a noun, both of which have been in use in English since before the 12th century. Along the way the word has also been associated, in an uncomplimentary fashion, with more than one country.
In 1699 B. E., author of The Canting Crew defined Welsh-fiddle as “the itch,” and also provided an entry for Itch-land with the definition of “Wales.” Several decades later lexicographer Nathaniel Bailey decided that Scotland was the proper answer to the question of ‘where is Itch-land?,’ and that the Itch could be referred to as either the Scotch or the Welsh fiddle. We advise you to avoid all these terms, when traveling in either country.
…but lest I should be again tormented with a supposed apparition, I besought my landlord to let his son sleep with me, which he obligingly did; and, to compleat my misfortunes, I got the Scotch fiddle, which I continued to play most harmoniously, while I remained in that kingdom.
— John Carteret Pilkington, The life of John Carteret Pilkington, 1762