How a Phobia Is Born

In "Fear or Phobia?" (3 August) I described a phobia as an alarm set too sensitively. So how does an alarm end up set that way in the first place?

Sometimes the answer is obvious. A dog bite at age six. A rough flight through a storm. A fainting episode during a blood draw. When the brain decides survival is at stake, it doesn't wait for a second opinion — a single bad experience can be enough to set the alarm. And there's a certain sense in that. If your ancestors ate a berry that made them violently ill, you'd want them to learn that lesson in one go, not after a leisurely course of repetition.

But that's only one route in, and probably not the commonest. Plenty of people with phobias have no such story to tell. They've never been bitten, never been trapped in a lift, never had a bad experience at the dentist — and yet the phobia is there, vivid and immovable. How?

The brain has more than one way of setting that alarm. Children absorb it by watching: a parent who goes rigid at the sight of a spider is teaching a lesson without saying a word. An alarm can also be installed by information alone — a frightening news story, a graphic warning, an older sibling's gleeful description of what happens at the dentist. The brain files it all away under "danger," and it doesn't much care whether the evidence was first-hand.

And once the alarm is set, the brain protects it. Every time you avoid the trigger, you feel a wave of relief — and that relief acts as a reward, quietly confirming that avoidance was the right call. The phobia isn't weakening in the background while you steer around it. If anything, avoidance keeps it well fed.

This is why "just face your fear" is such unhelpful advice on its own. The learning didn't happen in the logical, deliberate part of your mind, so logic and deliberation struggle to reach it. The alarm needs to be reset where it was installed.

Next week, in "Inside a Session" (17 August), I'll show you what that resetting actually looks like. I think it will surprise you — mostly by how calm it is.

If you would like to talk through any of this, my contact details are below.

Warmly, Denise