Healing from trauma can occur. It is possible to heal by rewiring your brain by neuroplasticity. When you constantly train your brain of some healing process by practicing some exercises, real changes occur in your brain. But healing process is an ongoing practice, you have to keep that in mind. It's not like physical illness for which you give medications and you are cured. It is an ongoing practice throughout your life. Sometimes you might feel like you will never heal but it is possible by practicing few tools.