癪

Han character

 * 1) spasms, convulsions
 * 2) hysteria

Kanji

 * 1) spasm

Etymology
Coined in Japan as a,  from elements  +. The original sense was, and the character was coined from the way that this physical pain happens a lot over time.

The reading comes from the goon reading shaku of constituent part.

First cited in 1593.

Adjective

 * 1)  upsetting, trying, angering

Noun

 * 1)   abdominal cramps, especially menstrual
 * 2)  anger, upset