noun, noun or participle which takes 'suru'
treatment; hair treatment
Primarily used for cosmetic or hair treatments, such as conditioning or salon treatments. Can also be used more broadly for other types of treatment, but 治療 (chiryō) is more common for medical contexts.
美容院で髪のトリートメントをしてもらった。
I got a hair treatment at the salon.
このシャンプーとトリートメントはセットで売っ
This shampoo and treatment are sold as a set.