Why Uncertainty Feels So Hard: New Research on Anxiety and the Need to Know
Have you ever noticed that your anxiety becomes worse when you do not know what is going to happen?
Maybe you reread a text looking for signs that someone is upset with you. You check your email repeatedly while waiting for an answer. You replay a conversation trying to determine whether you said something wrong. You may research every possible outcome before making a decision, or find yourself thinking, I just need to know.
For many people with anxiety, the uncertainty itself can become one of the hardest parts to tolerate.
Recent research is paying increasing attention to a concept called intolerance of uncertainty, or difficulty coping when an outcome is unknown. Rather than anxiety being driven only by what might go wrong, research suggests that the experience of not knowing can play an important role in maintaining worry across anxiety-related conditions.
What Is Intolerance of Uncertainty?
Intolerance of uncertainty does not simply mean that you prefer to have a plan. Most people feel more comfortable when they know what to expect.
It becomes more problematic when uncertainty begins to feel threatening or unbearable.
It might look like:
Constantly asking others for reassurance
Googling symptoms repeatedly
Overthinking decisions before making them
Replaying conversations in your mind
Avoiding situations where the outcome is unpredictable
Preparing excessively for things that may never happen
Assuming that an unknown outcome is likely to be negative
Feeling unable to relax until you receive an answer
These behaviors can provide short-term relief. The problem is that they may also teach the brain that uncertainty really is something dangerous that needs to be eliminated.
Why Does Anxiety Want Certainty?
Anxiety is designed to help us anticipate potential threats. When something feels uncertain, the brain may begin generating possibilities in an effort to protect us.
What if I lose my job?
What if they are angry with me?
What if this symptom means something serious?
What if I make the wrong decision?
The anxious mind often responds by trying to solve uncertainty through worry.
But worry does not always create certainty. Instead, it can create the feeling that if you think long enough, prepare enough, or analyze every possibility, you will eventually feel completely safe.
Unfortunately, complete certainty is rarely available.
A 2025 review published in Neuroscience & Biobehavioral Reviews described intolerance of uncertainty as an important process across anxiety-related disorders. The review highlighted several mechanisms that may help people respond differently to uncertainty, including cognitive reappraisal, behavioral exposure, attentional strategies, acceptance, and learning to step back from anxious thoughts.
Overthinking May Be Part of the Cycle
One reason anxiety can feel exhausting is that uncertainty often leads to rumination or repetitive thinking.
For example, after a social interaction, someone may think:
Why did they respond like that?
Was I awkward?
Should I have said something different?
A 2025 study examining emerging adults found that greater intolerance of uncertainty was associated with greater social anxiety, with rumination appearing to play an important role in that relationship.
Another recent study of adults with generalized anxiety disorder examined pathways between intolerance of uncertainty and worry, further supporting the idea that how people respond to uncertainty may be central to persistent anxiety.
This helps explain why telling yourself to “stop worrying” often does not work. The goal is not simply to eliminate anxious thoughts. It is to change your relationship with uncertainty and with the urge to solve every uncomfortable possibility.
Therapy Can Help You Become More Comfortable With Not Knowing
Effective anxiety treatment does not require you to convince yourself that nothing bad will ever happen.
Instead, therapy can help you develop greater confidence in your ability to cope even when you cannot predict the outcome.
Cognitive behavioral therapy may help identify catastrophic predictions and challenge patterns of thinking that make uncertainty feel more threatening. Behavioral interventions and exposure can help people gradually experience uncertainty without immediately checking, avoiding, researching, or seeking reassurance.
Research also suggests that acceptance, mindfulness, and cognitive distancing strategies may help change the way people respond to uncertain situations.
Over time, the goal becomes less about obtaining certainty and more about developing the ability to say:
“I do not know what will happen, but I can handle not knowing right now.”
When Anxiety Starts Taking Over
Some anxiety is a normal part of life. But when worry begins affecting sleep, relationships, work, school, decision-making, or your ability to enjoy everyday experiences, it may be time to seek support.
At Nurturing Life Counseling our clinicians provide evidence-based therapy for anxiety using individualized approaches that may include cognitive behavioral therapy, behavioral interventions, psychodynamic therapy, strength-based approaches, and trauma-informed care.
Therapy can help you better understand the patterns behind your anxiety while also developing practical tools to manage worry, overthinking, reassurance seeking, and avoidance.
You may never have complete certainty about what comes next.
But you can become much more confident in your ability to handle it.
