What the anxiety is protecting.
Most people who arrive here understand their anxiety reasonably well. They know the triggers. They have tried managing it: breathing techniques, journalling, CBT. Some of those things help in the moment. What has not changed is the underlying state.
Anxiety very often signals an injury to the self's sense of competence or safety. Not a malfunction in the nervous system. A response to a felt threat, sometimes one that has been carried for a long time, often one that is no longer present in the same form but continues to be anticipated. The question worth asking is not only how to reduce the anxiety but what it is communicating about what the self believes is coming.
Anxiety that persists despite understanding has usually found a job. The nervous system is maintaining vigilance: scanning for what might arrive before it does, preparing for outcomes that feel dangerous, staying ahead of what cannot be fully predicted. That vigilance was not irrational when it formed. It was a response to conditions where anticipation was the only available form of control. Understanding those conditions does not release the nervous system from its assignment.
This work approaches anxiety at that level: not the symptoms, but what the vigilance is protecting. The approach draws on relational psychodynamic therapy and ISTDP. More on how the therapy works.
On worry specifically — what it is and why knowing it tends to change so little — there is a piece in Reflections: On Worry.