What is overthinking?

Cleveland Clinic describes overthinking as an unhealthy habit that typically causes more stress by focusing on the negative, dwelling on the past and worrying about the future. On this site we use the word for thinking that keeps circling the same ground and never arrives anywhere new.

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What the word means in psychology

A related thinking style has a name in research: Researchers group worry and rumination together as "repetitive negative thinking": worry is about problems in the future, rumination is focused on the past. Definitions stress the tendency to get "stuck" in negative thinking.

So the content can change, a text one week and a decision the next, while the pattern stays the same: the thought comes back, it is about something that went or could go badly, and it is hard to switch off.

Is overthinking a mental illness?

According to Cleveland Clinic, overthinking is not a recognized mental health condition, but it can be a symptom of depression or anxiety.

Worry and rumination are not specific to one condition: research finds them involved in anxiety and depression, among other mental health problems.

That is why nothing here can tell you what your own looping thoughts mean. If you are wondering whether something more is going on, a doctor is the person to ask; the section below and “When to get help” further down list where to start.

What it can look like day to day

  • Running through a conversation again on the way home, hunting for the line that sounded wrong.
  • Opening a message you sent hours ago to check how it reads now.
  • Lying awake while tomorrow’s meeting plays out in five different versions.
  • Comparing two options so many times that the choice gets harder, not easier.
  • Asking yourself “why do I always do this?” and getting no answer, just a heavier mood.

Not sure whether yours fits? The one-minute check walks through a single thought and points you to the tool that suits it. It gives no score.

Two common forms: worry and rumination

Looking forward, overthinking tends to sound like “what if…?”. Practical worries are often about a situation affecting you now, where something can be done. Hypothetical worries are often "what if" thoughts about the future that may not have a solution, however hard you look for one. The worry tree helps you tell those two apart and decide what to do with each.

Looking back, it sounds more like “why did I…?” or “if only…”. A loop about something that has already happened is the job of the rumination worksheet, which trades the “why” questions for “how exactly did it go?”.

When to talk to someone

If you struggle to turn off your thoughts at night, or overthinking is affecting your daily life, Cleveland Clinic suggests talking to your doctor or a therapist.

The tools on this site are for everyday loops. They are not a stand-in for that conversation, and you do not need to have tried them first.

Questions people ask

Is overthinking the same as anxiety?

Not exactly. According to Cleveland Clinic, overthinking is not a recognized mental health condition, but it can be a symptom of depression or anxiety.

Isn’t thinking things through a good thing?

It can be, when it ends in a decision or a next step. Thinking and rethinking about what bothers you can feel like problem-solving, but this habit usually does not bring any resolution.

Is there a test for overthinking?

Researchers use questionnaires. The Perseverative Thinking Questionnaire is a 15-item self-report measure of repetitive negative thinking. This site does not score you: its check is a way to look at one thought, not a measure.

Why do I overthink in the first place?

The guide why do I overthink goes through what research links it to.

When to get help

These are self-help tools, not medical advice or a diagnosis. Talk to a doctor, or to one of the lines below, if:

  • you have thoughts of harming yourself (see the lines below).
  • you feel low or hopeless, and it is not lifting. The NHS suggests seeing a GP if you have had a low mood for more than 2 weeks, or if the things you are trying yourself are not helping.
  • the worry is getting in the way of your daily life. The NHS suggests talking to a GP if anxiety is affecting your daily life.
  • the thoughts feel unwanted and push you to check things or ask for reassurance again and again. OCD involves unwanted, intrusive thoughts that keep coming back, and compulsions such as asking for reassurance or checking. The NHS says it is important to get help if it has a significant impact on your life.

Lines you can call

  • US:988 Suicide & Crisis LifelineCall or text 988Free and confidential, 24/7. You can also chat at 988lifeline.org.
  • UK & Ireland:Samaritans116 123Free to call, day or night.
  • England:NHS 111111, mental health optionUrgent help from the NHS when it is not an emergency.

In the US, in life-threatening situations, call 911. In the UK, if someone's life is at risk, call 999 or go to A&E. For urgent help in England, use NHS 111 online or call 111 and choose the mental health option. Elsewhere, call your local emergency number.

Sources

  1. How To Stop Overthinking: Tips and Coping Strategies. Cleveland Clinic Health Essentials. clevelandclinic.org
  2. Overthinking Disorder: Is It a Mental Illness? Cleveland Clinic Health Essentials. clevelandclinic.org
  3. Egan SJ, Greene D, Callaghan T, Raghav S, Funk J, Badenbach T, Talam S, Kemp G, McEvoy P, Ehring T, Kopf-Beck J (2025). Worry and rumination as a transdiagnostic target in young people: a co-produced systematic review and meta-analysis. Cognitive Behaviour Therapy 54(1):17–40. PMC11627211
  4. Chellingsworth M, Farrand P, Rayson K (2013). Dealing with Worry in Low Intensity CBT. University of Exeter (CEDAR), via East London NHS Foundation Trust. elft.nhs.uk (PDF)
  5. Ehring T, Zetsche U, Weidacker K, Wahl K, Schönfeld S, Ehlers A (2011). The Perseverative Thinking Questionnaire (PTQ): Validation of a content-independent measure of repetitive negative thinking. Journal of Behavior Therapy and Experimental Psychiatry 42(2):225–232. PMID 21315886
  6. Low mood, sadness and depression. NHS. nhs.uk
  7. Anxiety. NHS Every Mind Matters. nhs.uk
  8. Symptoms - Obsessive compulsive disorder (OCD). NHS. nhs.uk
  9. Where to get urgent help for mental health. NHS. nhs.uk
  10. Suicide Prevention. National Institute of Mental Health (NIMH). nimh.nih.gov
  11. 988 Suicide & Crisis Lifeline. 988 Suicide & Crisis Lifeline. 988lifeline.org
  12. Contact a Samaritan. Samaritans. samaritans.org

Sources checked claim by claim by an AI review. Approved for publishing by Oleksii Y. on 2026-10-05.

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