Processing the trauma doesn’t remove the memory of it completely; it just files it away. The trauma remains accessible, but only if and when we want to access it. In other words, we have control over it. It no longer invades our thoughts or has an influence over our reactions. Processing the trauma also has the beneficial effect of freeing up that log-jam so that our regular, day-to-day events can now start to be processed in the normal way, during sleep*.
And very often, those symptoms of anxiety, depression or anger can start to fade too.
* Results vary from person to person.