Why avoidance makes anxiety bigger

Avoidance shapes the size of what is being avoided. There are two reasons not to do something: preference, which is settled and carries no internal cost, and avoidance, which gives short-term relief while quietly making the avoided thing feel larger over time.

Written and reviewed by Matthew Hallam, Registered Psychologist (AHPRA PSY0002471369). 9 min read. Published 14 May 2026. Last reviewed 14 May 2026. Next review 14 May 2027.

Two kinds of "not doing"

Preference and avoidance can look almost identical from the outside. The friend's birthday drinks you didn't go to. The phone call you didn't return. The work meeting you let pass without contributing. From the outside, each is simply something you didn't do. The difference is on the inside.

Preference is settled. You considered the thing, it didn't appeal, you let it go, and the decision sat well. There was no internal cost. Avoidance feels different. You considered the thing, you didn't do it, and something in you registered the not-doing. There may have been relief in the moment of the decision. There may have been a small ache afterwards. There may have been a reason offered to other people that you only half believed yourself.

A working test is what happens if you imagine yourself doing the thing anyway. With preference, the imagined version produces nothing in particular. With avoidance, the imagined version produces a small amount of what you were already trying not to feel. Anxiety, anticipated awkwardness, the sense that it would have been too much.

This distinction matters because avoidance does something specific to the world. Each individual choice has a reason, and each reason makes sense in isolation. The pattern over weeks and months is what becomes a noticeably smaller life, in ways the person living it might not have intended.

Why avoidance grows the thing

Researchers who study avoidance describe it as a process that is reinforced by the very thing it is trying to manage (Wang, Tian, & Yang, 2024). The mechanism has two parts.

Each time you avoid something, the brain gets a small reward. Each time, the thing avoided gets coded as a little more dangerous than it is.

The first is relief. When you decide not to go to the thing, the anxiety drops. The body relaxes. The body has learned something. Something quiet, but durable: when I was going to do this, I felt anxious. When I decided not to, the anxiety stopped. This must be the kind of thing that makes me anxious. The next time, the anxiety arrives a little earlier. The avoidance comes a little sooner. The relief is now part of the loop.

The second part is what didn't happen. When you avoid something, the brain doesn't get to update its estimate of how dangerous the thing was. The anxious prediction was never tested. Research on how anxiety changes describes this as a problem of inhibitory learning: the system needs to encounter the situation, find that the feared outcome did not arrive the way it was predicted, and store that mismatch (Craske, Treanor, Zbozinek, & Vervliet, 2022). Avoidance keeps the original prediction in place.

Combine these. Each avoidance gives relief. Each avoidance keeps the threat estimate intact. The thing avoided gets coded, gradually, as more dangerous than it actually is. The world gets a little smaller. The feeling that the world is dangerous gets a little louder.

Small steps are big steps

Take social anxiety as a worked example. A common version of the experience: you used to be more or less okay in social situations, and somewhere along the way the okay-ness went. Now you decline more invitations than you accept. You arrive late, leave early, or rehearse the leaving so it doesn't look like a leaving. You can do the meeting, but only after worrying about it for two days. The world has narrowed by what feels like small, reasonable decisions.

The frame this guide is offering does not say do the things you have been avoiding. It says notice that the not-doing is part of why they have become so hard.

In social anxiety specifically, the reframe that gets most underused is this. Small steps are big steps. Showing up at all is a big step, before you even worry about being more social. Going to the thing for twenty minutes is a step. Sending the text you have been avoiding is a step. Standing at the edge of a conversation without talking is a step. The system needs the encounter in order to update. The encounter does not have to be brave. It has to be there.

Australian research on social anxiety treatment has found structured approaches to social situations effective for many people across one-on-one, group, and remote formats (Hall et al., 2025). The shared ingredient across formats appears to be approach itself: not in the sense of forcing yourself into hard situations, but in the sense of being present for the smaller versions of the situation often enough for the system to register them as survivable.

Things you might notice, once you have this frame: that something you used to do without thinking has become something you would rather not. That you have been preparing for hours for events that did not warrant that preparation. That you have been declining things that the version of you from three years ago would have accepted easily. That the size of the avoided thing in your head no longer matches the size of the thing in reality.

Avoidance gives relief in the short term and shrinks the world in the long term. The distinction between preference and avoidance is one of the more useful frames for noticing what your choices have been doing, once you have stopped to look. Hold it lightly. If it helps you describe what your behaviour is doing, to yourself or to someone else, it has done its job.

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