i-adjective
oversensitive; high-strung; thin-skinned
Describes a person who is easily affected by small things, worries too much, or is emotionally delicate. Often used in contrast with 神経の太い (thick-skinned, insensitive).
See also: 神経が細い
彼は神経の細い人で、ちょっとしたことですぐ落ち込む。
He is an oversensitive person and gets depressed over little things.
Being the high-strung type, I can't stand loud noises.