expression, ichidan verb
be oversensitive; be on edge; worry too much
Idiomatic expression meaning to be overly sensitive, nervous, or anxious about something, often with a nuance of being on high alert or easily irritated.
Lately, he's been on edge about work.
そんな小さなことに神経を尖らせる必要はないよ。
There's no need to get so worked up over such a small thing.