Rumination means repeatedly focusing on your own distress, and on what caused it and what it might mean, without that focus moving towards doing anything. The everyday sense of chewing something over is close. The technical definition is narrower and more useful, because it names the two features that make it harmful rather than merely unpleasant.
The word is borrowed from digestion, from the animal that brings food back up to chew it again. Nobody chose a flattering metaphor and the accuracy is the point.
What rumination is, precisely
Two requirements. The focus is on the distress itself, its causes, meanings and consequences, rather than on the situation as a problem to be solved. And the thinking is repetitive and passive, returning to the same ground rather than moving through it.
The response styles literature describes this as a habitual way of responding to low mood: something happens, mood drops, and attention turns inward onto the mood. [nolen-hoeksema-2008-rumination] Calling it a response style rather than a trait matters. A trait is who you are. A response style is a habit that was learned, which means the same repetition that built it can be used against it.
Rumination and reflection are not the same thing
The difference is the direction of the questions, and it is the most practically useful distinction on this page.
Reflection asks answerable questions that face outwards and forwards. What actually happened. What would I do differently. What is the next step. These terminate, because they have answers.
Rumination asks unanswerable questions that face inwards. Why does this always happen to me. What does this say about the kind of person I am. Why am I like this. There is no answer that closes the question, so the thinking cannot finish, and every pass adds another layer of the same feeling.
This is why being told to think it through is such poor advice for somebody in the second mode. They are thinking it through. That is the problem.
A schematic of the reflection-versus-rumination distinction described in this section. Not measured data.
Why it matters more than it looks
Three findings, and the middle one is the one that changes how people think about it.
It predicts the onset of depressive episodes, rather than simply appearing alongside them, and it lengthens the episodes that occur. [nolen-hoeksema-2008-rumination] It impairs problem-solving, which is exactly backwards from how the activity feels, because attention on the meaning of the distress is attention not on the situation producing it. And it erodes social support over time, since the person on the receiving end of the fourth retelling has a limit that nobody announces.
The wider review literature adds a fourth: rumination is transdiagnostic. It shows up in anxiety, psychosis, insomnia and impulsive behaviour as well as depression, and it interferes with therapy itself when it goes unaddressed. [watkins-2020-mechanisms] Our guide to overthinking covers that wider family and where rumination sits inside it.
Why it starts without a decision
Rumination runs on thoughts that mostly follow a handful of recognisable patterns, and our piece on cognitive distortions covers what those are and why naming one does almost nothing on its own.
Because it becomes automatic. The mechanism most often proposed is habit: a response repeated in a particular context enough times begins to run on its own when the context recurs, which is why rumination starts before you have decided anything and is well established by the time you notice. [watkins-2020-mechanisms]
That has a direct practical consequence and it is not the one people expect. The lever is not deciding to stop, since you are not there at the moment it starts. It is noticing earlier, and then having something specific to do at the moment of noticing.
Reflection or rumination?
Think of something you have been going over. Tick anything true of how you have been thinking about it. This is a reflection prompt rather than a test, and it produces no diagnosis.
0 of 6 ticked
The self-directed and unanswerable questions are the signature, and the last item is why deciding to stop does not work. The move that helps is switching the question: from what this says about you, to what specifically you would do next. If low mood has been there for a fortnight or more, that is worth a conversation with a doctor rather than more thinking.
Most people move between the two modes on the same problem. If you ticked the fifth item you are partly in reflection already, and the useful thing is to notice what tips you out of it: for most people it is a drop in mood rather than a new fact about the situation.
Nothing here matched. Going over a difficult thing and arriving somewhere is reflection, and it is a different activity from the one this article describes, however uncomfortable it is at the time.
The screener above uses PHQ-9, the questionnaire most clinicians use. It measures depressive symptoms rather than rumination, and no validated screener on this site measures rumination itself.
What treats it
Approaches built for the process rather than the content. Rumination-focused cognitive behavioural therapy was developed specifically for this, and in a randomised trial adding it to treatment as usual for residual depression improved symptoms and remission rates, with the effect mediated by change in rumination itself. [watkins-2011-rfcbt] The trial had no attentional control group, so it cannot separate the specific content of the therapy from general therapy effects, and that is worth knowing before treating it as settled.
Its central move is shifting from abstract to concrete: from why this happened to what specifically occurred and what would be different next time. Mindfulness-based approaches reach the same process from another direction, by training you to notice thinking as thinking, and our guide to mindfulness for rumination covers the practice. The depression hub covers the condition rumination most reliably predicts.
When to seek help
Speak to a doctor if you have been going over the same material for weeks, if it is affecting your sleep or your work, or if it comes with low mood or loss of interest lasting more than a fortnight. Use the word rumination and say the thinking is repetitive rather than that you are stressed, because therapies that target it directly exist and a general referral does not produce them by default.
Go sooner if the material you are going over involves something frightening or violent that happened to you, since that points towards trauma-focused treatment rather than this.
Go urgently if you have thoughts of harming yourself. Contact your local emergency services or a crisis helpline.
How MyFreud can help
Rumination is easiest to interrupt early and almost impossible to see from inside, which is why noticing the days it takes hold matters more than analysing any one of them. MyFreud gives you daily mood tracking that shows the pattern across weeks.
Download MyFreud and start today: App Store or Google Play.