Quick Answer:
Overthinking is usually what psychologists call rumination — a repetitive loop of negative, self-focused thoughts. Your brain does it to try to feel safe and in control, but experts call this an "illusion of control" because the loop rarely resolves anything. Rumination is closely tied to anxiety and low mood. The good news: it's a modifiable habit, not a fixed trait.
Why your brain does it
Rumination is the mind's attempt to self-regulate — to gain predictability and mastery over a worry or a painful memory. But psychologists describe it as "an illusion of control," because going over the same thoughts keeps the problem active rather than solving it.[1] In other words, overthinking feels productive while usually making things worse.
The link to anxiety and low mood
Rumination is closely tied to both anxiety and depression — it can be a symptom and a driver, forming a self-reinforcing cycle where low mood fuels more rumination and rumination deepens the low mood. A large study of nearly 6,000 adults found that rumination both increases the risk of depressive symptoms and results from them.[2] It also tends to worsen sleep, and clinicians note that when rumination isn't targeted directly, people tend not to do as well in treatment.[1]
How to reduce overthinking
- Catch and question the thought. Cognitive behavioural therapy (CBT) and cognitive restructuring — noticing an anxious thought and gently testing whether it's actually true — directly target the loop.[2]
- Break it with action. Exercise, a hobby, or simply changing your physical environment interrupts the loop.[2]
- Schedule a "worry time." Give worries a limited slot; outside it, note them down and let them wait.
- Use mindfulness and slow breathing to step back from thoughts rather than being swept along by them.
- Confide in someone you trust for perspective.[2]
Get the thoughts out of your head
Our free CBT worry journal helps you catch a looping thought and weigh the real evidence — the core CBT skill for overthinking. Grounding with 5-4-3-2-1 also breaks the spiral.
Open the worry journal →When to seek help
If overthinking is persistent, distressing, disrupts your sleep or daily life, or comes with low mood, talking to a doctor or therapist is a reasonable step — CBT (including rumination-focused CBT) is well supported.[3] Explore our Anxiety Center.
Sources & References
- [1] American Psychological Association — Targeting perseveration to reduce distress
- [2] Harvard Health Publishing — Break the cycle (of rumination)
- [3] NHS — Generalised anxiety disorder — Self-help
For general information only, not a substitute for professional care. In a crisis, contact a professional or a crisis line (988 US, Samaritans 116 123 UK & ROI).