There always a fine line to be walked in therapy. Talking aboyt past traumas are going to be relived.
Therapy is the place best to relive past traumas.
Being "triggered" is at the beginning of the work. As the work continues the trigger lessens.
If we don't rexperience traumas, they can't be known or healed.
Within the context of therapy. This "normal" . If it never lessens. Then the therapy is ineffective.