To stop replaying a conversation, give your brain what the replay is looking for: usually the line you did not say, or an answer to whether you got it wrong. Write the conversation out, add the ending you wanted, then decide whether anything actually needs doing. A replay that has somewhere to finish tends to quieten.
Replaying is not random. Your mind goes back to a conversation because something in it feels unfinished: you were caught off guard, you said something you regret, or you did not say the thing you meant. The replay is an attempt to rehearse a better version, or to check for danger, like whether someone is now angry with you.
That is why telling yourself to stop thinking about it rarely works. The question it is asking has not been answered.
These work because they answer the replay instead of fighting it.
Some replays are years old: a row before someone left, a thing a parent said, the last conversation in a relationship. These usually come back because the feeling attached to them was never expressed, not because the words matter now. Writing the full, unfair, furious or heartbroken version once, to nobody, can do more than another hundred replays.
If the conversations you replay are ones where you were frightened, belittled or threatened, that is not ordinary overthinking. It can be the mind processing something that was genuinely harmful, and it is worth talking to someone about it.
Replays get loudest when nothing else is competing for attention. Keep a notepad by the bed and write the conversation out rather than running it again in the dark. If it is the middle of the night and the replay has turned into something heavier, Samaritans answer at any hour on 116 123 in the UK, free. Outside the UK, findahelpline.com lists services.
Usually because something in the conversation feels unfinished: a line you did not say, a worry that you upset someone, or being caught off guard. The replay is your mind trying to rehearse a better version or check for a threat.
Write the conversation out as a transcript, add the line you wish you had said, and decide whether anything practical needs doing. If it comes back, postpone it to a set time rather than trying to push it away.
Old replays often carry a feeling that was never expressed. Write the full, unedited version of what you wanted to say, once, to nobody. It is the unexpressed feeling, not the words themselves, that keeps it coming back.
It can be part of anxiety or of overthinking generally, and almost everyone does it sometimes. If it takes up hours a day, stops you sleeping, or is tied to something frightening that happened, it is worth talking to a GP or a counsellor.
Write down exactly what happened and then what the other person probably remembers of it, which is usually far less. Most embarrassing moments loom much larger for the person who had them than for anyone who saw them.
Write the line you never said. Then let it go.
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