You have a sleep wrinkle on your face, but since your young it will go away right away.
You have a sleep line on your face, but it will go away right away since your young,
寝起きの時、顔につくあと~sleep wrinkle, sleep line,sleep mark.
顔につく線の後– crease marks, wrinkles.
❶You have a sleep wrinkle on your face, but since your young it will go away right away.
(顔に寝たあとがついてるよ、でも若いからすぐ戻るね)。
❷You have a sleep line on your face, but it will go away right away since your young．
(顔に寝たあとがついてるよ、でも若いからすぐ戻るね)。
例えば:
When your young, sleep marks go away right away but when you get older, they take forever to go away.
(若い時、顔の後はすぐ消えるけど、歳を取るとなかなか消えないのよ)。
You can see the pattern from the towel on your face, but you're young, so it disappears quickly.
この場合、次のような言い方ができますよ。
ーYou can see the pattern from the towel on your face, but you're young, so it disappears quickly.
「顔にタオルの跡がついたね、でも若いからすぐ消えるよ」
the pattern from the towel「タオルの跡」
to disappear で「消える」
ご参考まで！
アメリカ合衆国 
カナダ 
