noun, noun or participle which takes 'suru'
nipple piercing
Refers to the jewelry itself or the act of piercing the nipple. Can be used as a noun or with する to mean 'to get a nipple piercing' or 'to pierce a nipple'.
彼女は乳首ピアスを開けた。
She got a nipple piercing.
乳首ピアスをつけると感染に気をつけてください。
When you wear a nipple piercing, please be careful about infection.