This is the 9273rd most frequent Japanese word.
痒い
Itchy.
Here '痒い' is used as an adjective to describe the sensation of itchiness experienced on the arm.
虫に刺されて腕が痒いです。
My arm is itchy from a bug bite.
In this usage, '痒い' metaphorically conveys a slight sense of irritation or discomfort.
彼は話を聞かないのでちょっと痒い気持ちになります。
I feel a bit irritated because he doesn’t listen to what I say.
Here '痒い' is used to describe the physical sensation of itchiness affecting the baby's skin, a common reaction to dryness.