What is overthinking? Thinking it through vs. replaying it

Overthinking, in this article, means going over something for a long time without taking a step forward. Say you’ve been staring at an “Ok, got it” text for ten minutes while your head lines up three ways the other person might react. Or you’re back at your desk after a meeting, replaying line by line what you said wrong.

What is overthinking? What a Taipei psychologist’s article says about neihao, and how this article uses the word

The Taipei City Community Mental Health Center uses the Chinese word neihao for a state in which the mind is already running at full speed before anything has happened.

The center’s feature article, written by a psychologist, defines the term this way (our translation): “Neihao refers to a state in which a situation has not actually happened yet, but the mind has already shifted into ‘high gear.’ The brain keeps thinking about what could go wrong, how others see you, and whether the relationship will turn awkward, without actually moving anything forward.” The article’s opening notes that many people would call this “thinking too much.” That article is framed around workplace relationships and does not discuss rumination. Our editorial judgment is that rehearsing, replaying, comparing and hesitating can also fall within the word’s range. This article does not treat overthinking as a diagnosis, and it does not write it up as a personality type.

Is neihao a mainland Chinese word? What dictionaries show and don’t show

None of Taiwan’s three Ministry of Education dictionaries lists neihao, yet the Taipei City Community Mental Health Center’s psychologist-written article uses it, and the word’s origin has not been verified.

We searched the Ministry of Education’s Revised Mandarin Dictionary (Chongbian Guoyu Cidian Xiudingben), Concise Mandarin Dictionary (Guoyu Cidian Jianbianben) and Idiom Dictionary (Chengyu Dian) for neihao and got 0 results in each (rechecked October 2, 2026). In Taiwan the word does turn up in a psychologist’s article titled “Is workplace interpersonal neihao hard to bear?!” (title translated), published by the Taipei City Community Mental Health Center, whose page shows a 2026 update date. It covers neihao in workplace relationships, so it cannot show whether the word is in general use in Taiwan.

A dictionary leaving a word out does not mean Taiwan doesn’t use it. No reliable source turned up for where the word first became popular, so this article does not say whether it came from Taiwan or mainland China.

Thinking it through vs. replaying it: how research tells reflection from rumination

Nolen-Hoeksema’s response styles theory defines rumination as repetitively and passively focusing on the symptoms of distress and on their possible causes and consequences, without leading to active problem solving.

Nolen-Hoeksema, Wisco and Lyubomirsky (2008) keep that definition in their review. The point is that the thoughts stay on the problem and the feelings and never turn into action. The same review also separates rumination from worry. Worry tends to focus on threats that could happen but haven’t yet. Rumination can also involve worry about future threats, but it is mainly about looking back at what already happened and asking why it happened and what it means.

Research has also tried to measure “thinking it through” and “replaying it” separately. Trapnell and Campbell (1999) split self-focus into two tendencies, rumination and reflection, and Treynor et al. (2003) went on to split the rumination scale into two factors. As the 2008 review recounts it, the items for brooding center on abstract “why me?” questions and on obstacles to overcoming problems, while the items for pondering include more general self-reflection and some problem-solving content. Brooding and pondering are two factors of one scale, not two kinds of people. They roughly match the two tendencies in Trapnell’s scale, but they are not identical.

The same review reports that pondering was linked to fewer depressive symptoms in longitudinal follow-up, yet pondering measured at the same time point was linked to more depressive symptoms, and other findings also leave its adaptiveness in doubt. For brooding, the positive correlation with depressive symptoms showed up both at the same time point and in one-year follow-up.

The review’s authors themselves write that it is still unclear which kinds of self-reflection are adaptive. So this cannot be boiled down to “reflection good, rumination bad,” and it should not be read as research denying the link between rumination and depression.

Scales are research tools, so they are not rewritten as quiz questions here, and this article offers no overthinking self-test.

The Taipei article describes neihao as something that happens before things have actually happened, and the 2008 review says worry tends to focus on future threats. Going by those two statements, rehearsing (thinking ahead about something that hasn’t happened) and worry point in a similar time direction. That link, and how overthinking relates to worry and rumination, is our editorial judgment, not the conclusion of any study. Each of these terms is useful, and they can’t simply be swapped for one another. Thinking deeply is not automatically overthinking, and the trait of being highly sensitive is covered in the guide on highly sensitive people.

What does it look like to rehearse other people’s reactions before you decide?

One kind of overthinking starts with playing the other person’s reaction through your head first.

Before replying to a text, you picture three different reactions from the other person. To turn down a coworker’s invitation to Friday happy hour, you rehearse the conversation twice in your head. Lying in bed on a Sunday night, you’re already working out how to open Monday’s meeting. Rehearsing is only thinking something through beforehand. The problem is a round that ends with no new information, so the next day you start from the top again.

When what you’re rehearsing is “what will they think of me,” it touches the approval-seeking side of people-pleasing, for example worrying that a coworker who sees your message will think you’re not professional enough.

The People Pleaser Test has 24 questions, split into four facets of 6 questions each: saying no, approval seeking, conflict avoidance and putting yourself last. It takes about 4 minutes. The result is a pleaser index from 0 to 100, and one of four types based on your strongest facet. It measures a tendency to people-please and can’t tell you whether you overthink.

How do you know if you’re overthinking? Four scenarios to watch for, no score

You can tell by whether your thinking is moving forward, not by a score.

Our editors wrote these four scenarios and their matching actions themselves. They have not been validated by research and are not a scale: there are no levels and no symptom lists. Each scenario comes with one observation question.

• Rehearsing beforehand: The text hasn’t gone out, and you’ve already played the other person’s reply through three times. Observation question: Did this round bring any new information, or just a different way of saying the same thing?
• Replaying afterward: The meeting is over and you’re still going over which line didn’t land. Observation question: After the replay, what is a next step I can take, or am I just looking at the same picture again?
• Comparing yourself with others: You scroll past a coworker’s promotion announcement in a work chat and start calculating how far behind you are. Observation question: What did this comparison tell me that I can adjust?
• Flipping back and forth before a decision: You’ve listed both options several times and still haven’t decided. Observation question: Do I need more information, or a deadline for deciding?

If the answer to every question is “no,” that doesn’t mean there is a problem or that there isn’t one. It is only an observation.

How to stop overthinking: four small things you can do today

These are everyday adjustments, not treatment, and the goal is to get your thinking out of the same spot.

• Rehearsing: Write the worry as “I’m guessing they’ll…” and mark it as a guess or something you know. A guess on paper is easier to check than three reactions in your head.
• Replaying: Give replaying a fixed slot, 10 to 15 minutes a day, and set it aside the rest of the time.
• Comparing: Give comparing a window with notifications off, for example no checking your feed for an hour after dinner.
• Hesitating: Give the decision a deadline and write down the smallest next step, such as asking one person before tonight.

A Taipei City Community Mental Health Center feature on excessive thinking in depression mentions “pause and switch,” “awareness” and “set a worry time” (our translation of the step names). Pausing and switching means leaving the situation you’re in, for example standing up and walking around, making a cup of tea, getting some fresh air on the balcony, or moving to a different space. A worry time is a fixed 10 to 15 minutes a day. That article is about the excessive thinking common in depression, though, and this one borrows only its everyday steps. The two are not about the same thing.

When should you talk to someone? When distress lasts two weeks or more and affects your life, work or sleep

If emotional distress lasts two weeks or more and affects your life, work or sleep, it is worth seeking professional help.

That timing comes from the Taipei City Community Mental Health Center’s feature on excessive thinking in depression. If you want someone to talk to, you can call or text 988 to reach the 988 Suicide & Crisis Lifeline in the United States. According to SAMHSA, it offers free and confidential support 24/7.

This article does not judge whether anyone has a condition, which takes an in-person evaluation by a professional. However much you’ve been thinking, talking it over with someone you trust is also a way to get the thought out of your head.