Overthinking and Tolerating Uncertainty: From Seeking Certainty to Greater Flexibility

Spending hours wondering why a message went unanswered, calculating every possibility before deciding, replaying a conversation in your mind… Sometimes what we seek is no longer information, but a feeling of certainty that will finally put doubt to rest. What happens when life cannot provide it?

This article offers a narrative discussion of selected academic studies and public clinical information resources; it is not a systematic review. The examples are fictional illustrations, not client accounts. The text does not replace individual assessment or treatment.

When does thinking become a loop?

“Overthinking” is a broad everyday expression, not a psychiatric diagnosis in itself. Revisiting the past and mentally rehearsing possible futures can overlap within the same day. The useful question is not simply how many minutes someone spends thinking, but what that thinking is doing.

Watkins’s (2008) review shows that repetitive thought is not invariably harmful: its content, context and abstract or concrete processing matter. Revisiting an issue can sometimes support preparation or meaning-making. Treating every recurrence as a symptom overlooks this distinction. [1]

This comparison is not a diagnostic tool. Difficult decisions understandably take time. One useful distinction is: “Have I learned anything new in the last half-hour, or am I trying to remove the discomfort that this same question brings up?”

Uncertainty itself, or what it means to us?

Not knowing an outcome differs from knowing that the outcome will be bad. Yet an unanswered message may already feel like rejection, while a decision still pending can feel like a disaster approaching. Assumptions fill the gap between what is known and what is feared.

Intolerance of uncertainty is a research concept describing difficulty coping with the distress of not knowing. A recent review describes its relevance beyond generalized anxiety, across different difficulties and situations. The definition and measurement of the construct remain subjects of debate. [2]

In everyday terms, “I do not know the result” may become “I cannot bear not knowing the result.” The first sentence describes the limits of available information. The second reveals what staying within those limits means to the person. That meaning varies: making a mistake, facing criticism, being left alone or being caught unprepared may carry particular weight.

How can certainty-seeking appear in daily life?

The wish for certainty may become more than a thought. It can appear as rereading a message, repeatedly asking different people to endorse a decision, or never feeling sufficiently informed to stop researching. The function of the same action depends on its context: checking an important document and repeatedly checking it without a new reason are not equivalent.

This diagram is an editorial illustration of one possible everyday pattern. It does not describe everyone’s experience or represent a single research finding.

What does research tell us—and what does it leave open?

In Ladouceur and colleagues’ (2000) experiment involving 42 participants, the condition designed to increase intolerance of uncertainty produced more reported worry than the condition designed to decrease it. This offers experimental evidence about the link. A small laboratory study cannot explain every person’s anxiety through one cause. [3]

In a randomized trial of 60 adults with generalized anxiety disorder, Dugas and colleagues (2022) found better outcomes for an intervention using uncertainty-focused behavioral experiments than for a waiting list. The findings are promising, but do not establish superiority over every other therapy or the same outcome for everyone. [4]

This distinction matters. Evidence for a structured intervention does not turn a single exercise read online into individualized treatment. The sample, comparison condition and assessment methods define what can be concluded. The purpose here is to help describe an experience more accurately, rather than encourage readers to assign themselves a diagnosis.

The personal question beneath the thought

“What will happen if I make this decision?” sometimes comes with another question: “How will I treat myself if I am wrong?” If a person expects harsh self-criticism after even a small mistake, reviewing a decision can become endless. More data alone may not address the emotional burden of choosing.

A psychodynamic perspective can explore what not knowing or not being in control evokes in a person’s relationships. Have there been situations where they felt responsible for anticipating everything? What feelings arise when needing someone or waiting for a response? These are theoretical questions for reflection, not evidence of a particular family history, trauma or unconscious cause.

Exploring personal meaning can sit alongside observing everyday behavior. “Why am I doing this?” becomes more specific when accompanied by “What happened just then, what did I feel, and what did I do?” The intention is to approach experience with curiosity and less judgment, rather than turn the self into another puzzle that must be solved perfectly.

Developing a different everyday response

1. Define the issue in one sentence

The CCI problem-solving guide distinguishes present, actionable problems from hypothetical worries. A current problem may call for a limited plan; repeatedly imagining a possible future does not serve the same function. [5]

For example, replace “Everything at work is going wrong” with “I do not have the agenda for tomorrow’s meeting.” The second statement identifies something you can request. It does not require settling the future of your career tonight. This distinction acknowledges uncertainty while making the immediate responsibility clearer.

2. Give information-seeking a stopping point

For a low-risk daily choice, consider defining what you need to know before beginning your research. Choosing a book might require its subject and a few sample pages, rather than every review ever written. The aim is not to rush important decisions, but to consider in advance when a small decision has been examined sufficiently.

Then record something observable: what you expected, what you did and what happened afterwards. If discomfort appeared, that does not automatically make the attempt a failure. “Could I continue with my chosen activity while somewhat uncomfortable?” offers a different measure from “Did I become completely calm?”

3. Notice the recurring question and make room for your day

CCI’s worry-postponement information sheet describes briefly noting a worry, leaving it for a scheduled time and returning to the current activity. The intention is not to prevent thoughts from appearing, but to experiment with not entering an extended debate immediately whenever they do. [7]

A returning thought does not prove that you have done something incorrectly. You can notice, “This topic has returned,” and redirect attention to the paragraph, conversation or task in front of you. Turning this into another demand for flawless performance may simply give the search for certainty a new form.

4. Remember that not knowing is not the same as a bad outcome

CCI’s uncertainty module emphasizes recognizing the demand for a guarantee and returning attention to the present. Acceptance does not require convincing yourself that the future will turn out well; it makes space for the fact that outcomes cannot all be known in advance. [6]

Uncertainty when living abroad

Working in another language, waiting for an administrative decision, or making choices far from family can involve genuine information gaps. “I should think less” does not adequately explain difficulties created by the environment. Translation, reliable information or an answer from the relevant institution may be needed.

Imagine someone awaiting a job application result and repeatedly rereading their CV. Checking the requirements and asking for an update at an appropriate time are concrete steps. Turning the employer’s silence into a definite verdict on personal worth is another level of interpretation. The relationship between migration and belonging is discussed further in the article on acculturative stress and bicultural identity.

When might professional support be useful?

If repetitive thinking substantially interferes with sleep, work, relationships or everyday decisions, or if checking and reassurance take up much of the day, an assessment with a mental health professional may be helpful. The context, duration and any accompanying difficulties need individual consideration.

The goal of psychological work need not be a permanently silent mind. A more meaningful goal may be choosing how to respond while doubt is present, setting limits around responsibility, and continuing to participate in life. For information about the consultation process, visit the contact page.

References

1. Watkins, E. R. (2008). Constructive and unconstructive repetitive thought. Psychological Bulletin, 134(2), 163–206. View publication
2. Dugas, M. J., Koerner, N., & Freeston, M. H. (2026). State of the science: Intolerance of uncertainty. Behavior Therapy, 57(1), 17–36. View publication
3. Ladouceur, R., Gosselin, P., & Dugas, M. J. (2000). Experimental manipulation of intolerance of uncertainty: A study of a theoretical model of worry. Behaviour Research and Therapy, 38(9), 933–941. View publication
4. Dugas, M. J., et al. (2022). Behavior Therapy, 53(6), 1147–1160. doi:10.1016/j.beth.2022.05.003. View publication
5. Centre for Clinical Interventions (2015). What? Me Worry!?! Module 7: Problem-Solving. View publication
6. Centre for Clinical Interventions (2015). What? Me Worry!?! Module 9: Accepting Uncertainty. View publication
7. Centre for Clinical Interventions. Postpone Your Worry. View publication