noun, noun or participle which takes 'suru', intransitive verb
washing one's hair; shampooing
Neutral noun and する-verb for washing hair, used in daily life and salon contexts.
毎朝、洗髪してから出かけます。
I wash my hair every morning before going out.
美容院で洗髪してもらった。
I had my hair washed at the salon.
シャンプー is the common loanword for 'shampoo' (the product or the act), while 洗髪 is a more formal or written term for the act of washing hair.
Compound of 洗 (wash) and 髪 (hair). The reading is on'yomi.