itch
n. countablen. an uncomfortable feeling on your skin that makes you want to scratch it. You can also use it to describe a strong desire to do something.
n. an irritating sensation on the skin that triggers a desire to scratch. Often used figuratively to describe a restless or persistent urge to perform a specific action.
I have a small itch on my arm.
The wool sweater gave him a persistent itch that lasted all afternoon.
After five years of living in the same quiet suburb, he began to feel a familiar itch to sell his house and travel across the continent.
Commonly used with the verbs 'have' or 'get'; the figurative sense often takes an infinitive ('an itch to travel').
The mosquito bite is itching me.The mosquito bite is itchy.Learners often use the noun or verb form when they need the adjective 'itchy' to describe a state.