Anxiety sensitivity is the fear of anxiety itself. More specifically, it’s the tendency to believe that the physical and mental sensations of anxiety, like a racing heart, dizziness, or difficulty concentrating, are dangerous or harmful. Someone with high anxiety sensitivity doesn’t just feel anxious; they become frightened by the feeling of being anxious, creating a cycle that amplifies the original distress.
This concept, sometimes called “fear of fear,” was first formally described in the mid-1980s and has since become one of the most studied vulnerability factors in anxiety research. It’s not a diagnosis on its own but a personality trait that exists on a spectrum and shapes how you respond to stress, discomfort, and uncertainty in your body.
How Anxiety Sensitivity Works
Everyone experiences physical sensations when they’re stressed or anxious: a pounding heart, shallow breathing, muscle tension, a feeling of lightheadedness. For most people, these sensations are mildly unpleasant and fade on their own. For someone with high anxiety sensitivity, those same sensations trigger alarm. A pounding heart gets interpreted as a sign of an impending heart attack. Feeling lightheaded becomes evidence that you’re about to faint or lose control. Difficulty concentrating feels like the beginning of a mental breakdown.
This pattern of catastrophic misinterpretation is central to how anxiety sensitivity operates. The sensations themselves are harmless, but the beliefs attached to them are not. Those beliefs generate more fear, which generates more physical arousal, which generates more catastrophic thoughts. The result is a feedback loop that can escalate a mild stress response into overwhelming panic in minutes.
Anxiety sensitivity has three distinct dimensions, each reflecting a different type of fear about anxiety symptoms:
- Physical concerns: fear that bodily sensations like a racing heart or chest tightness signal a serious medical event.
- Cognitive concerns: fear that mental symptoms like racing thoughts or poor concentration mean you’re losing control of your mind.
- Social concerns: fear that visible signs of anxiety, such as blushing, trembling, or sweating, will lead to embarrassment or rejection.
A person can score high on one dimension and low on the others. Someone primarily worried about physical sensations has a very different experience than someone whose main fear is that other people will notice their anxiety.
Anxiety Sensitivity vs. Trait Anxiety
These two concepts sound similar but describe different things. Trait anxiety is a general tendency to feel anxious more often and more intensely across situations. It predicts that you’ll experience more anxiety in the future. Anxiety sensitivity is narrower: it predicts that you’ll be specifically afraid of anxiety sensations when they occur. The difference matters because someone with high trait anxiety might worry about finances, relationships, and health in a general way, while someone with high anxiety sensitivity might feel fine until they notice their heart rate climb, at which point they become terrified.
Another key distinction: anxiety sensitivity can explain why some people with phobias don’t actually fear the object itself. A person with a spider phobia and high anxiety sensitivity may not believe spiders are dangerous. What they fear is the uncontrollable panic reaction the spider triggers. The spider is just the match; the fear of their own anxiety response is the fuel.
What Causes It
Anxiety sensitivity appears to be shaped by both genetics and life experience, with neither factor fully explaining it on its own. Longitudinal twin studies show that anxiety sensitivity is moderately heritable at every age tested, meaning your genetic makeup accounts for a meaningful portion of where you fall on the spectrum. Genetic influences tend to remain relatively stable over time, with new genetic factors emerging during late adolescence.
Environmental influences play a significant role as well, but they tend to be more time-specific, meaning that individual experiences at particular moments in life (a frightening health scare, witnessing a parent panic, a traumatic event) can shift your anxiety sensitivity up or down. Some stable environmental influences persist across time, but on the whole, life experiences create more fluctuation than genes do. This is actually encouraging: it means anxiety sensitivity is not fixed. It can be shaped by what happens to you, and it can be reshaped by deliberate intervention.
The Link to Panic Disorder
Of all the conditions connected to anxiety sensitivity, panic disorder has the strongest and most consistent relationship. A three-year prospective study confirmed that anxiety sensitivity predicts the onset of panic disorder symptoms even after accounting for general trait anxiety. The physical concerns dimension, specifically the fear that bodily sensations signal something medically catastrophic, was the only significant predictor of future panic symptoms among the three dimensions.
This makes intuitive sense. Panic attacks are essentially extreme versions of the anxiety sensitivity cycle: a physical sensation gets misinterpreted as dangerous, the fear response floods the body with adrenaline, more intense sensations follow, and the person becomes convinced something terrible is happening. People with high anxiety sensitivity are essentially pre-loaded for this cycle. They already believe that anxiety sensations are harmful, so when a panic attack begins, their interpretation confirms and accelerates it.
Anxiety sensitivity is also associated with depression and post-traumatic stress, though the connections are less specific than with panic disorder. The cognitive concerns dimension, the fear of losing mental control, tends to be more closely tied to depressive symptoms.
The Connection to Chronic Pain
High anxiety sensitivity doesn’t just affect how you experience anxiety. It also changes how you experience pain. Research on chronic pain patients shows that anxiety sensitivity contributes to pain hypervigilance, the tendency to constantly scan for and fixate on pain signals. This hypervigilance amplifies the perceived severity of pain, which in turn worsens both physical and mental quality of life.
The mechanism is similar to what happens with anxiety: if you believe that physical sensations are dangerous, you pay more attention to them, and paying more attention makes them feel more intense. For someone with chronic pain and high anxiety sensitivity, a normal fluctuation in pain levels can trigger fear that something is getting worse, leading to avoidance of activity, increased muscle tension, and ultimately more pain.
How Anxiety Sensitivity Is Measured
The standard tool is the Anxiety Sensitivity Index (ASI-3), an 18-item questionnaire with six questions for each of the three dimensions: physical, cognitive, and social concerns. Each item is rated on a scale from 0 (“very little”) to 4 (“very much”), producing subscale scores and a total score. Higher scores indicate greater anxiety sensitivity. Research has identified a total score of around 25 as a threshold that, while not perfectly precise, offers moderate accuracy in identifying people at elevated risk for developing panic symptoms over the following three years.
How It’s Treated
The most effective approach for reducing anxiety sensitivity is a technique called interoceptive exposure, which directly targets the fear-of-fear cycle. The idea is straightforward: you deliberately produce the physical sensations you’re afraid of, in a controlled setting, until your brain stops treating them as threats.
In practice, this involves exercises like running in place to raise your heart rate and body temperature, spinning in a chair to induce dizziness, hyperventilating briefly to create lightheadedness and tingling, breathing through a narrow straw to simulate shortness of breath, or tensing all your muscles to produce the fatigue and tension you associate with anxiety. Each exercise is matched to the specific sensations that bother you most.
Before the exposure work begins, you typically learn about why your body produces these sensations during stress, how physical symptoms interact with thoughts and behaviors, and why avoiding uncomfortable sensations keeps the fear alive. Then the exposures are practiced both during sessions and at home between sessions.
The results are substantial. In one study using a structured protocol that included interoceptive exposure, average anxiety sensitivity scores dropped from 30 to about 19.6 by the end of treatment, a large effect. Those gains held at a six-month follow-up, where scores dropped slightly further to around 17.6. The reductions in anxiety sensitivity also correlated with lower overall symptom severity, meaning that as people became less afraid of their own anxiety, their actual anxiety levels improved across the board. Notably, the most significant drops in anxiety sensitivity occurred right when interoceptive exposure was introduced into the treatment sequence, suggesting it’s the active ingredient rather than a byproduct of general therapy.
Because anxiety sensitivity cuts across multiple conditions, reducing it can have a ripple effect. The same treatment study found similar improvements in anxiety sensitivity regardless of whether participants had been diagnosed with panic disorder, generalized anxiety, social anxiety, or obsessive-compulsive disorder. Lowering anxiety sensitivity appears to pull the rug out from under several different anxiety problems at once.