One's fingers itch to do sth..

例句：

1. 1. I itch to go hiking every weekend.
   我每个周末都想去徒步旅行。
2. 2. She itched to tell him the truth.
   她很想告诉他真相。
3. 3. The cat itched all over its body.
   这只猫全身都在痒。