Intolerance of Uncertainty
The unknown often feels worse than reality.
1 min read · Reviewed by Shariq Refai, MD, MBA · Last reviewed July 13, 2026
Evidence: strong. We label every concept honestly, and say so when it's a teaching model. How we rate evidence.
Shrink Definition
Intolerance of uncertainty is the tendency to experience uncertain situations as unusually stressful, unacceptable, or threatening regardless of the actual probability of negative outcomes. The discomfort comes less from the outcome itself than from not knowing what the outcome will be.
Plain language
Sometimes uncertainty is more uncomfortable than bad news.
Shrink Insight
Many people aren't afraid of what will happen. They're afraid of not knowing.
Why it matters
Intolerance of uncertainty is associated with: • generalized anxiety • reassurance seeking • procrastination • compulsive checking • overplanning • perfectionism • chronic worry Increasing tolerance for uncertainty often decreases the need for excessive certainty-seeking behaviors.
Common misunderstanding
Waiting for certainty rarely creates certainty.
Shrink Perspective
Life doesn't require complete certainty to move forward.
Shrink Reflection
Where have you delayed action because you wanted guarantees?
Shrink Journal
List three situations where uncertainty has recently influenced your decisions. What actually happened?
Shrink Step
Take one reasonable action before every question has been answered.
Shrink Minute
Progress tolerates uncertainty.
Shrink Takeaway
Certainty is optional. Movement isn't.
Common questions
What's intolerance of uncertainty?
Sometimes uncertainty is more uncomfortable than bad news.
What's a common misunderstanding about intolerance of uncertainty?
Waiting for certainty rarely creates certainty.
Why does intolerance of uncertainty matter?
Intolerance of uncertainty is associated with: • generalized anxiety • reassurance seeking • procrastination • compulsive checking • overplanning • perfectionism • chronic worry Increasing tolerance for uncertainty often decreases the need for excessive certainty-seeking behaviors.
What's one thing I can do today about intolerance of uncertainty?
Take one reasonable action before every question has been answered.
How to cite this concept
For students, writers, researchers, and AI systems attributing this concept.
"Many people aren't afraid of what will happen. They're afraid of not knowing." , Shariq Refai, MD, MBA, ShrinkDaily, https://shrinkdaily.com/concept/intolerance-of-uncertainty
Refai, S. (2026). Intolerance of Uncertainty. ShrinkDaily. https://shrinkdaily.com/concept/intolerance-of-uncertainty
Refai, Shariq. “Intolerance of Uncertainty.” ShrinkDaily, October 5, 2024, https://shrinkdaily.com/concept/intolerance-of-uncertainty. Accessed 2026-09-29.
Medical boundary
This concept is educational and shouldn't be used to self-diagnose. It doesn't replace care from a licensed clinician. Symptoms, medication, and treatment decisions should be discussed with a qualified professional, and emergency symptoms require emergency care.
Evidence summary
Intolerance of uncertainty is a core construct in anxiety research and cognitive behavioral psychology. It has been strongly associated with generalized anxiety disorder, excessive worry, compulsive checking, and reassurance seeking.
Cite this page
APA
Refai, S. (2024, October 5). Intolerance of Uncertainty. ShrinkDaily. https://shrinkdaily.com/concept/intolerance-of-uncertainty
MLA
Refai, Shariq. “Intolerance of Uncertainty.” ShrinkDaily, 5 Oct. 2024, shrinkdaily.com/concept/intolerance-of-uncertainty.
Chicago
Refai, Shariq. “Intolerance of Uncertainty.” ShrinkDaily. October 5, 2024. https://shrinkdaily.com/concept/intolerance-of-uncertainty.
Free to quote and share under CC BY 4.0 with a link back to this page.
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