Chasing is a listed symptom, not a personality trait: one of the nine DSM-5 criteria for gambling disorder is that after losing money a person "often returns another day to get even ('chasing' one's losses)". Two things in the products themselves keep it running. The almost-win, which reads as progress when it is a loss, and the fact that modern gambling has no natural end.
What we are and are not going to claim
You will find a great deal written about what gambling does to your brain, most of it borrowed from drug research and delivered with more certainty than anybody has earned.
We are going to stay on ground you can check yourself. What follows is a description of how the products are built and what that does to a session. You can verify all of it by looking at the app you actually use, which is worth considerably more than a diagram of a brain.
Design feature one: the almost-win
Two of the three symbols. The horse caught on the line. Four numbers out of five. The cash-out figure that climbs and then collapses in the last minute.
Look at what happens on the screen when that occurs. There is usually something: a sound, a highlight, a slow reveal of the losing element rather than an instant result. The event is a loss, in that the money has gone, and the presentation of it is nothing like the presentation of a plain loss.
That is the trick, and it works because of how your own account of the session gets written. A near miss does not feel like evidence that you lost. It feels like evidence that you are close, that the thing is nearly working, that stopping now would be stopping just before it comes good. Twenty of those in an evening and you leave believing you had a decent night, having lost the same money as somebody who lost twenty times flatly.
Two things you can do with that, tonight.
**Count them.** Next time, notice how many of your losses are dressed as almosts. People are usually startled.
**Rewrite the sentence.** "I nearly won" and "I lost" describe an identical bank balance. The first one is the product talking.
Design feature two: nothing ever ends
The older shape of gambling had stopping points built into it. A race finished, the coupon was settled, the shop shut, the match ended and you went home.
Look at what has replaced it. In-play betting means a match is not one event but two hundred. Cash out means a settled bet can be reopened and re-decided. Next-market prompts mean the moment one thing finishes another is offered. Online, nothing closes at eleven o'clock.
The result is that there is no moment where the session naturally ends, so ending it has to be an act of will performed against a machine that is designed never to offer you the exit. Nobody is weak for losing that argument at half past one in the morning.
Which is the whole case for external limits rather than internal ones. A block does not need to be persuaded at 1am. [The layers, in the order to set them up, are here](/guides/gambling/gamstop-bank-blocks-and-blocking-apps).
And the money has been made frictionless too
This one is documented rather than observed. The University of Bristol's research team, reviewing bank card gambling blockers, counted "over 170 ways to make online gambling transactions. E-wallets form a sizeable chunk of this."
That is worth sitting with. Every other kind of spending has natural friction: a card to find, a form to fill, a delivery to wait for. Gambling has been engineered in the opposite direction, to the point that the main tool for slowing it down, the bank block, has to work by reading a merchant category code and can be routed around by moving money into a wallet first.
The Bristol team also found that over a third of bank blockers "can (unhelpfully) be toggled on and off by customers at will, making them a light switch rather than a lock." So even the brake has been built for convenience.
None of this is a conspiracy. It is what a competitive market does to the design of anything. It does mean that the friction you need has to be added by you, deliberately, against products optimised to remove it.
Why the chase is the most expensive part
The two design features above make sessions long. The chase is what makes them ruinous, because it converts a bad night into a series of them.
Notice what the chase actually claims. It presents the next stake as recovery, as though the money already gone were retrievable, when the honest description is that you are risking a second sum on top of the first. People who run budgets competently at work will do this at midnight, which tells you it is not about numeracy.
The chase also has a shape you can plan around. It has a window, usually the same night or the following day, and it has a trigger, which is a loss above some size that is personal to you. Both of those are things you can write down. [Mapping your own danger zones takes half an hour](/guides/gambling/your-gambling-triggers-and-danger-zones), and the chase window is the single most valuable row on it.
What to do with all this
Understanding the mechanism does not stop you gambling. It does three smaller things, and they add up.
- **It moves the explanation off your character.** You lost to a product built by people whose job it is to make it hard to leave. That is a different sentence from "I have no self-control", and it leads somewhere.
- **It tells you which tools to trust.** Anything that relies on you making a good decision inside the session is unreliable, because that is the exact thing the design is working on. Anything that operates before the session, or that cannot be undone during it, is worth setting up.
- **It makes the plain-loss language a habit.** "I lost" rather than "I nearly won". "That is gone" rather than "that is recoverable".
If it helps to keep the blocks, the risky hours and the person who knows in one place, that is what [Renovyn's Shield](/shield) is for. Friction, plus somebody in the loop. It is not treatment.
The National Gambling Helpline is 0808 8020 133, 24 hours a day. Samaritans is 116 123. NICE tells clinicians that gambling harms can be "a dominant risk factor for suicidal ideation and suicide attempts, even in the absence of other risk factors", and that the risk may be highest immediately after a gambling episode, so if you are reading this straight after one, use the numbers.
Common questions
**Why do I keep chasing my losses when I know it makes it worse?** Because knowing and doing are separate systems, and because the chase presents itself as a way of undoing a loss rather than as a new risk. It is one of the nine diagnostic criteria for gambling disorder, which is another way of saying it is one of the most common things about the condition rather than something unusual about you.
**What is a near miss in gambling?** An outcome that fails but is presented as nearly succeeding: two of three symbols, a horse pipped, a cash-out value that climbs and collapses. Financially it is identical to any other loss. What differs is the presentation, and that is what keeps the session running.
**Are gambling apps designed to be addictive?** We will not tell you what any operator intended. What is documented is that the payment routes have been made extremely frictionless, that researchers counted over 170 ways to fund online gambling, and that a third of bank blockers can be switched off at will. Draw your own conclusion about the direction of travel.
**Does understanding it help me stop?** By itself, not much. What it changes is which tools you trust. If the design works on your decision-making inside a session, the useful defences are the ones set up beforehand and not reversible during it, like [self-exclusion and bank blocks](/guides/gambling/gamstop-bank-blocks-and-blocking-apps).
Sources
- [DSM-5 gambling disorder criteria (Connecticut DMHAS reproduction)](https://portal.ct.gov/-/media/dmhas/pgs/dsmdiagnosispdf.pdf). Loss chasing as one of the nine criteria for gambling disorder.
- [University of Bristol PFRC, A Blueprint for Bank Card Gambling Blockers (2020)](https://www.bristol.ac.uk/media-library/sites/geography/pfrc/A%20Blueprint%20for%20Bank%20Card%20Gambling%20Blockers%20-%20Report.pdf). The count of over 170 payment routes, the e-wallet gap, and the finding that many blockers behave as a light switch rather than a lock.
- [NICE NG248, Harmful gambling recommendations](https://www.nice.org.uk/guidance/ng248/chapter/recommendations). Gambling harms as a dominant risk factor for suicidal ideation, and the timing of that risk.
