I'm afraid to leave the house

The picture has a clinical name — agoraphobia — and is widely misunderstood. It is not fear of open spaces but fear of being somewhere from which leaving would be difficult or embarrassing if something went wrong: the underground, a checkout queue, the middle of a cinema row, a bridge, a motorway with no exits.

It usually begins after one or more panic attacks. Having experienced panic on a bus, the brain associates the bus with danger. Avoiding the bus lowers anxiety immediately, and the drop reinforces the avoidance. Next time, the list expands: the tram too, then the large supermarket, then any long walk.

The mechanism that expands the territory is avoidance itself. Every detour confirms the place was dangerous and that only avoiding it saved the situation. The person never learns that nothing would have happened, and the safe zone contracts month by month until only the house is left.

Then come the safety behaviours: only going out with someone, only with a water bottle, only on the known route, only with a pill in the pocket. They make going out possible and simultaneously prevent learning — because success gets attributed to them rather than to the danger not existing.

The best-evidenced intervention is graded exposure, and it works exactly against instinct.

• Build a ladder, not a leap. Ten situations ordered by difficulty, from “I go to the gate” to what you avoid entirely. You start at a level that produces discomfort, not panic.
• Stay until it drops, not until it ends. Leaving at the peak of anxiety reinforces avoidance. Anxiety falls on its own if you stay — that is the new information the brain needs, and it cannot get it any other way.
• Drop the safety behaviours gradually. The water bottle, the phone in hand, someone's presence — each prevents learning, because success gets attributed to them.
• Repeat often and briefly, not rarely and at length. Five short outings in a week do more than one long one a month.
• Don't wait for the fear to pass before going out. The order is the reverse: action comes first, and fear falls afterwards through repetition. With a therapist building the ladder alongside you, the road is far shorter than alone.