回答

・hair is damaged
・hair gets damaged

hair is damaged/hair gets damaged可以用來表達「頭髮受損」。

順帶一提，光滑的頭髮可以用hair is smooth and shiny來表示。

You'll damage your hair if you use a hair iron too much.
『如果過度使用燙髮器，則會損壞頭髮』

My hair was damaged, so I had a treatment at a hair salon.
『頭髮受損，所以我在美髮沙龍接受治療』

有幫助｜0