The sentence that keeps coming back: what rumination is and why it isn't reflection

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Someone said something to you three days ago. Nothing big. A passing comment, an odd tone in a voice note, a curt «fine» at the end of a conversation. And since then the sentence keeps coming back. In the shower, on the metro, when you switch off the light. You turn it over and over, imagine what you should have replied, what the other person really meant, what it says about you.

Or it isn't a sentence. It's an argument that replays in full inside your head, with new comebacks each time. Or a mistake at work that has already been fixed, but your mind keeps reviewing it as if it had to stand trial again.

Psychology has a name for this: rumination. It's worth knowing, because it isn't the same as thinking a lot, or the same as being a thoughtful person. This text explains what it is, how it differs from reflecting, how it relates to depression and anxiety, what helps according to research, and why, for me, writing a lyric sits on the opposite side.

A word from the farm

To ruminate is what cows do: swallow, bring the food back up and chew the same thing again. Psychology borrowed the word because it captures the feeling so well. The thought doesn't move forward. It comes back.

The person who studied it most was the American psychologist Susan Nolen-Hoeksema, a professor at Yale, who died in 2013. The Association for Psychological Science remembers her work: in 1991 she proposed that dwelling on problems, compared with distracting yourself, prolongs depressive symptoms. She also researched why depression is about twice as common in women as in men, and suggested that the tendency to ruminate could explain part of that gap.

Her core idea is simple: rumination means focusing again and again on your own distress, its causes and its consequences, without moving on to do anything about it. Questions like «why do I feel like this?», «why does this always happen to me?», «what did I do wrong?». Questions that seem to be looking for an answer, but actually go round in circles.

In 2008, Nolen-Hoeksema, Blair Wisco and Sonja Lyubomirsky published a review called «Rethinking Rumination». It brought together almost twenty years of studies and concluded that rumination worsens depression, strengthens negative thinking, gets in the way of problem solving, holds back action and wears down support from other people.

Ruminating is not reflecting

This is the most useful part. Many people who ruminate believe they are reflecting. They believe that if they think hard enough, they'll eventually understand. And research says there are two very different ways of thinking about what hurts.

In 2003, a team including Nolen-Hoeksema took a close look at the questionnaire used to measure rumination and found two components. Psychologists Anson Whitmer and Ian Gotlib summarise them in a 2011 paper:

• Brooding: dwelling on your own mood in a passive, judgemental way. Comparing yourself, blaming yourself, asking why you can't cope.
• Reflection: thinking about what is happening to you deliberately, with an eye on solving something.

Both were linked to depressive symptoms at the time they were measured. But a year later the difference was clear: brooding predicted more depression, and reflection, less.

British researcher Edward Watkins added another piece in a 2008 review in Psychological Bulletin, «Constructive and unconstructive repetitive thought». Thinking about something many times isn't always bad: it also helps us plan, recover from a blow or come out of depression. What makes it harmful depends, among other things, on whether the thinking is abstract or concrete.

Abstract is «why am I like this?». Concrete is «what exactly happened, in what order, and what can I do tomorrow at ten?». The first question has no bottom. The second has a way out, even a small one.

A home test that works for many people: after half an hour thinking about something, do you know anything you didn't know before, or have you decided anything? If the answer is no, and you also feel worse, you probably weren't reflecting. You were ruminating.

Depression, anxiety and the same loop

Rumination was first tied to depression, but it doesn't stay there. In 2022 a research team published a meta-analysis of 99 studies, reported by Infocop, the magazine of Spain's General Council of Psychology. People with major depression, generalised anxiety, social anxiety or anorexia ruminated more than people without those diagnoses. Brooding was raised above all in depression and in both forms of anxiety.

That's why researchers call it a transdiagnostic factor: one mechanism that runs through several different problems. Rumination looks backwards («why did it happen?») and its cousin, worry, looks forwards («what if it happens?»). Both share the loop.

I have been diagnosed with major depression, social phobia, post-traumatic stress, avoidant personality disorder and anxiety; I've written about it in the series on my mental health. I won't describe how my head works from the inside here, because that is work for the therapy room. But reading these studies helps me understand something I think is useful to many people: the loop isn't proof that you're weak, or that you're not trying. It's a process with a name, it has been studied, and it can be worked on.

What helps, according to research

First, what doesn't work well: trying not to think. Telling yourself «stop thinking about it» usually has the opposite effect. What does have backing is changing the way you relate to the thought.

Rumination-focused cognitive behavioural therapy. Edward Watkins and his team tested it in a 2011 randomised trial with 42 people whose depression had not lifted with medication. Those who added up to twelve sessions of this therapy to their usual treatment had fewer symptoms and more remissions, and the improvement worked through a drop in rumination. It's a small study without an active control group, as the authors themselves admit, but it opened a path. One of its key ideas is training exactly that shift from abstract to concrete.

Treatments aimed at repetitive thinking. In 2025 a meta-analysis in *Psychological Medicine* pooled 55 trials with almost 5,000 participants. Cognitive behavioural therapy moderately reduced repetitive negative thinking, both rumination and worry. And interventions designed specifically for that loop worked better than more general ones.

Mindfulness with a cognitive base. Mindfulness-based cognitive therapy teaches you to notice a thought without getting hooked on it. A 2016 meta-analysis in *JAMA Psychiatry*, with data from 1,258 patients, found it reduced the risk of depressive relapse compared with usual care, and also compared with other active treatments.

Things you can try day to day, always as a complement to professional help and never a replacement:

• Get concrete. Swap «why?» for «what?» and «how?». What happened, which part depends on me, what is the next small step.
• Give it a time slot. Some people set aside a fixed time each day to think about what worries them and postpone it outside that window. The point isn't to ban the thought, but to give it a place.
• Move. Walk, tidy a drawer, call someone. Nolen-Hoeksema had already observed that distraction, compared with rumination, shortened distress. It doesn't solve the problem, but it breaks the inertia.
• Notice without arguing. Telling yourself «I'm ruminating again» is already one step out of the loop.

And one clear signal: if you've been like this for weeks, if the loop is stealing your sleep, your appetite or your drive, or if thoughts of harming yourself appear, it's not the time for home remedies. It's time to ask for help: your GP, a psychologist, or 024 in Spain.

Writing a lyric is not ruminating

Now, my part. I write songs about things that hurt, and someone might think that's just rumination that rhymes. Going over a break-up, a bad night, something someone said to you. I think it's exactly the opposite, and science gives me a few clues as to why.

Ruminating means coming back to the same thing without getting anywhere. Writing a lyric forces you to get somewhere: to an image, to an order, to an ending. When I wrote «Ruido en mi mente» («Noise in my mind»), the loop was in the lyric itself:

Ruido ruido ruido en mi mente otra vez Cierro los ojos pero no se va esta vez

(Noise, noise, noise in my mind again / I close my eyes but this time it won't go.) That «again» is rumination exactly. But by putting it in a song, the noise is no longer only inside. When I read it line by line on this blog, I explained that writing it was a way of getting it out and putting it somewhere I could look at it. That's the opposite of the loop: distance.

A lyric also demands the concrete. You can't write «I feel bad» for three minutes. You have to find the stopped clock, the grey brick, the laughing moon. That search for details is, curiously, very close to what Watkins describes as constructive thinking.

And a lyric ends. It has a last line, it gets released and it stops being only yours. Rumination never ends: there's always another lap. In «Punto muerto» («Dead end») there's a sentence, the one about thinking I only bother other people, broken into pieces, almost word by word. Breaking it up was a way of looking at it up close, instead of letting it look at me.

Expressive writing has some backing, with nuances. A 2006 study by Gortner, Rude and Pennebaker, summarised by Yang and Li in *Frontiers in Psychology*, found that writing for twenty minutes on three consecutive days reduced depressive symptoms six months later, and that the effect worked through a drop in brooding. But not every study confirms it, and writing can also turn into rumination on paper if it only repeats the complaint. The difference, once again, lies in whether the writing looks for shape and a way out, or just returns to the same place.

Writing doesn't replace therapy. I have a psychologist by my side, and that's what really helps me work on what weighs on me. Songs sit next to that, not in its place.

If the sentence comes back tonight

If the sentence, the argument or the mistake comes back tonight, it may help to remember three things. It has a name. It isn't the same as thinking well, however much it looks like it. And there are well-supported treatments that teach you to step out of the circle.

You can try writing it down, bringing it down to the concrete, going out for a walk. And if the loop weighs too much, tell someone. Asking for help works: in Spain, 024 is on the other end of the line at any hour.