None of us can escape some level of trauma; inevitably, it will be a part of life. How much it affects us, however, depends on many factors including the nervous system we were born with, our outer resources, and how much relational support we receive to help us recover from the trauma. Many people do not have access to adequate resources to help them recover from trauma (and this is very subjective and personal, varying from person to person), and the trauma continues to affect them in (sometimes subtle, but still) impactful ways. If certain factors come together, PTSD may develop out of trauma. Often clients feel like they have failed because they can't completely "get over" their PTSD reactions. I have often reminded clients that PTSD is "the gift that keeps on giving". It can be very hard, perhaps impossible, to completely eradicate PTSD reactions, because the reaction is not just of the mind, it is of the whole body. My approach to helping clients with trauma and PTSD involves looking at it holistically and working to understand how the trauma changed you, your reaction across many facets of your life (thoughts, feelings, habits, behaviors, self-care or lack thereof, expectations, how you view the world), and then working on replacing what is harmful with what is helpful. The goal isn't to completely get rid of the PTSD symptoms (which is likely impossible) but rather to dramatically reduce its effect on you, so you can live your best life, and so an occasional symptom breaking through will not derail you.