As of current time, there is no "cure" for PTSD. You can learn to manage situations that previously triggered you, and various other techniques... retraining of the brain to file new material accurately. There is no data that shows it ever goes away completely nor permanently, however.

The good news is, the sooner someone obtains expert help with PTSD, the less it intrudes into their life later. Also, you do not have to go through all memories to file them. The brain will automatically take many of the similar missfiled memories and put them in their places... once it relearns how to do that.

It's common to have times of "remission" where you can manage quite well, and then.. maybe something new comes along and triggers you. Memories that you have worked on can arise back up, to be worked on more... (which is also part of filing them) With time, while they are still "memories" they will no longer have their terrible feelings associated with them, you will be able to look at them and put them back away (our of current active memory.) All this with therapy, of course.

be well.