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Anxiety and overeating: why it happens and what actually help
Updated: Sep 10
Most people who come to me for anxiety therapy don't mention the eating thing straight away. It usually comes out a few sessions in, almost as an aside. "I've also been eating a lot more than I should." Said quickly, like they're hoping I'll move past it.
So let's talk about it properly. Because anxiety-driven overeating is incredibly common, it makes complete sense when you understand the mechanism behind it, and the shame around it is usually doing more damage than the eating itself.
What's actually going on when anxiety makes you eat more
When you're anxious, your body produces cortisol. Cortisol is a stress hormone. In short bursts, it's useful. It gets you moving when you need to respond to something. But when anxiety is chronic (and if you're reading this, it probably is), cortisol stays elevated for weeks or months at a time.
Here's the problem: sustained cortisol directly increases appetite. Not just appetite in general, but specifically your drive toward high-fat, high-sugar food. Harvard Health's overview of stress and overeating puts it plainly: cortisol increases appetite and may also ramp up your motivation to eat.
So when you find yourself standing in the kitchen at 10pm eating biscuits out of the packet, that's not a willpower failure. That's your stress response doing exactly what it's designed to do. Your body thinks it needs fuel because it thinks you're under threat. The threat just happens to be your inbox, or your relationship, or a low-level dread you can't pin down.
Why the guilt makes it worse
This is the part most self-help articles skip. The eating itself isn't usually the biggest problem. The guilt afterwards is.
It tends to go like this:
You feel anxious
You eat to soothe the anxiety (it works, briefly)
You feel guilty about eating
The guilt creates more anxiety
You eat again to soothe that anxiety
Repeat
The cycle is self-reinforcing. And most advice about "emotional eating" actually makes it worse, because it treats the eating as the problem to solve. It's not. The anxiety is the problem. The eating is what you're doing about it.
When I work with clients on this, I'm not focusing on what they're eating. I'm focusing on what's driving the anxiety in the first place.
What doesn't help
I'll be direct about this, because there's a lot of advice out there that sounds reasonable but doesn't hold up.
"Just find a hobby to replace the eating." If your cortisol is elevated and your body is screaming for calories, knitting isn't going to cut it. Hobbies are great. They're not a substitute for treating the underlying anxiety.
"Practice mindful eating." Being more aware of each bite is fine in theory. In practice, if you're in a high-anxiety state, your prefrontal cortex (the part that does mindfulness) is already compromised. Telling an anxious person to be more mindful about food is like telling someone in a burning building to notice the architecture.
"You just need more willpower." Willpower is not the issue. Cortisol is. You can't willpower your way out of a hormonal response.
None of this means these strategies are useless. They're just not where to start. You start with the anxiety.
What does help
Address the anxiety directly. This sounds obvious, but it's the bit that gets skipped. If you reduce the anxiety, you reduce the cortisol. If you reduce the cortisol, the drive to overeat calms down on its own. Not overnight, but consistently over time.
In therapy, this means working out what's keeping the anxiety going. Sometimes it's thought patterns (CBT is good for this). Sometimes it's something older, a learned response from early life that's still running in the background. That's where memory reconsolidation can help, by updating the emotional learning that's fuelling the anxiety at its root.
Stop punishing yourself for eating. Seriously. The guilt cycle is one of the main things keeping the pattern alive. Eating when you're anxious is a normal physiological response. It's not a moral failing. Treating it like one just adds another layer of distress.
Get your basics in order. Not as a fix, but as support. Sleep matters more than most people realise (poor sleep increases cortisol). Regular meals (rather than skipping food all day and then bingeing in the evening) help stabilise blood sugar. Movement helps regulate cortisol. None of these replace therapy, but they make therapy work better.
Notice the pattern without judging it. Not "mindful eating" in the Instagram sense. Just: pay attention to when the urge hits. What happened in the hour before? What were you feeling? You don't have to change anything yet. Just notice. Over time, that awareness gives you more room to respond differently.
When it might be something more
I want to be honest about this. Anxiety-driven overeating is common and treatable. But if the eating patterns feel more extreme (bingeing and purging, restricting then bingeing, feeling completely out of control around food, or significant weight changes), that may point toward an eating disorder, which needs specialist support.
I'm an anxiety and trauma therapist. I work with the anxiety that drives disordered eating patterns. But if you think the eating itself has become its own problem, your GP can refer you to specialist eating disorder services, and that's the right move. The two aren't mutually exclusive. You can work on the anxiety and the eating at the same time, with the right people involved.
The short version
Anxiety makes you eat more. That's cortisol doing its job. The shame about it creates a cycle that makes both the anxiety and the eating worse. The way out isn't through willpower or hobbies. It's through treating the anxiety. When the anxiety comes down, the eating tends to follow.
If this sounds like something you've been dealing with, book a free consultation and we can talk about what's going on and whether therapy would help.
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