[Saph]

I don't think its related to mental illness in all cases :/ when i'm older I wont hesitate to get work done if I feel it would make me feel better about myself.

Typically, prettier people or well-known people worry more about ageing because it means they wont get the attention that they're used to anymore, so they resort to surgery to try and stay looking/feeling young, whereas for less attractive people its easier to age because it makes no difference.