痛 means pain and is a JLPT N3 kanji. It has 12 strokes and uses the sickness / bed radical (疒).
Stroke order · 12 strokes
On'yomi (音読み)
ツウ
Kun'yomi (訓読み)
いた(い)
Radical
疒 · sickness / bed
Strokes
12
How to remember 痛
Sickness (疒) has made its way through the body — pain. 痛い! — in Japan, the first word you learn when you twist your ankle, even before the language itself.