well it is my thought that social anxiety can stick with you to a degree. Because, depending on how it started it may be due to a developmental error in one's life, that once it occurs, and especially if it is let to happen for too long, it can be very hard to reverse if at all.
Once you become an adult and you have not "developed" in the way you should have as a younger person, it may be very hard to learn such skills when you are an adult, especially when there is great pressure on you to be so skilled.
Besides that it can be lead such imbalances that physiologically you may be permanently damaged.
I guess that is if you believe in such autonomy.