Acne itself is not permanent and can often be controlled through a few different types of treatments and lifestyle changes. Whilst it tends to go away for a lot of people in their twenties, for some others it can be a little longer and they usually have to seek out some form of treatment.
https://www.drnicoledermatology.co.uk/is-my-acne-permanent/#:~:text=Acne%20itself%20is%20not%20permanent,out%20some%20form%20of%20treatment.