na-adjective, noun
nervous; high-strung; sensitive
Describes a personality or temporary state of being easily affected by small things, prone to worry, or overly sensitive to one's environment.
彼はとても神経質で、ちょっとした物音でも目を覚ます。
He is very sensitive and wakes up at the slightest noise.
試験前は誰でも神経質になるものだ。
Everyone gets nervous before exams.
na-adjective, noun
fussy; particular; worried about details
Often used for being overly concerned with trivial matters, cleanliness, order, or minor imperfections.
彼女は食べ物の好みに神経質で、外食を嫌がる。
She is fussy about food and dislikes eating out.
そんな小さなミスに神経質になる必要はないよ。
You don't need to be so worried about such a small mistake.