Depending on the study you look at, somewhere between about 10% and 18% of the general population scores high enough on standard measures to qualify as trypophobic, with some individual samples pushing above 20%. That range is surprisingly wide for a single phenomenon, and the reasons it swings so much tell you a lot about what trypophobia actually is, how researchers try to pin it down, and why the science is still catching up to a condition that millions of people recognized in themselves long before any lab studied it.
The Numbers and Why They Disagree
The most commonly cited ballpark comes from studies using the Trypophobia Questionnaire, a validated symptom scale that asks people to rate how they feel when looking at clusters of small holes or bumps. One 2024 analysis puts the prevalence at roughly 10%.1PubMed Central. The social learning account of trypophobia But a large epidemiological study of young people in Hong Kong found a weighted prevalence of 17.6%.2BJPsych Open. Excessive fear of clusters of holes, its interaction with stressful life events and the association with anxiety and depressive symptoms And a 2024 study using the same questionnaire with a score cutoff of 31 found that about 24% of its 284 participants crossed the threshold, while noting that previous research had landed in a 7% to 17% range.3Scientific Reports. Trypophobia, skin disease, and the visual discomfort of natural textures
Why so much scatter? Part of it is how you draw the line between “mildly uncomfortable” and “trypophobic.” The Trypophobia Questionnaire produces a continuous score, not a clean yes-or-no diagnosis, so the cutoff a research team picks can shift results by several percentage points. Part of it is who you study. University undergraduates, online volunteers, and population-representative samples of teenagers in Hong Kong are different groups with different baseline anxiety levels and different exposure histories. And part of it is that trypophobia sits on a spectrum. Almost everyone finds at least some cluster images a little unpleasant; the question is where normal discomfort ends and a genuine phobic response begins.
How Researchers Measure It
The standard tool is the Trypophobia Questionnaire, or TQ, first developed and validated in 2015. It asks people to report symptoms they experience when viewing images of clustered holes or bumps, and it produces a single score that reflects the overall intensity of their aversion.4PubMed. Assessment of trypophobia and an analysis of its visual precipitation Independent psychometric testing has confirmed that the TQ measures one underlying construct with good reliability and that it performs consistently across sexes and age groups, though the scale could be better at distinguishing among people at the low end of the spectrum.5PubMed Central. Rasch analysis of the Trypophobia Questionnaire
That “room for improvement” at the low end matters. If the questionnaire is best at capturing people who are clearly trypophobic and less precise at sorting the “slightly uncomfortable” from the “not bothered at all,” borderline cases get shuffled around depending on the study’s specific cutoff. This is one reason why different papers can look at similar populations and land on prevalence figures that differ by a factor of two.
It Starts Young
One question that comes up often is whether trypophobia is something people learn from the internet, or whether the discomfort shows up before anyone could have been primed by viral images of lotus pods. The answer leans heavily toward the second option. Children as young as four or five show measurable discomfort when rating trypophobic images, even when the images are printed and shown during a live video call rather than displayed on a screen alongside scary captions.6PubMed Central. Preschool children aged 4 to 5 years show discomfort with trypophobic images A follow-up study looking at children aged four to nine confirmed that this discomfort is consistent and present across the age range, suggesting it does not simply emerge after exposure to social media.7Scientific Reports. Effects of cluster size on trypophobic discomfort in children aged 4–9 years
That does not mean social context plays zero role. The 2024 analysis that estimated a 10% prevalence rate also explored whether learning from others’ reactions could amplify or transmit trypophobic discomfort, finding that social learning may be part of the story.1PubMed Central. The social learning account of trypophobia But the evidence from preschoolers makes it hard to argue that trypophobia is purely a product of online culture. The tendency to be unsettled by clustered holes appears to be something humans carry from early childhood.
Disgust, Not Just Fear
People who experience trypophobia often describe it differently from a classic phobia like a fear of spiders or heights. The dominant emotion is disgust, not fear, though fear is also present. A 2025 study tested this directly by comparing people’s emotional responses to trypophobic images against both frightening and disgusting non-trypophobic images. People with the strongest trypophobic reactions rated cluster images as more disgusting than standard disgusting images and more frightening than standard frightening images, but disgust was clearly the stronger of the two emotions.8PubMed. Is trypophobia more related to disgust than to fear? Assessing the disease avoidance and ancestral fear hypotheses
This matters because it points toward a specific biological explanation: that trypophobia is rooted in disease avoidance rather than predator avoidance. When you recoil from a spider, your body gears up to flee. When you recoil from a pattern of holes that looks like diseased skin, your body is doing something closer to pulling away from contamination. The emotional flavor is nausea and skin-crawling, not the heart-pounding rush of a threat.
What Happens in the Body
Pupil measurements help confirm this disgust interpretation. In experiments where researchers tracked people’s eyes, images of holes caused the pupils to constrict, a response linked to the parasympathetic nervous system and associated with disgust. Images of threatening animals, by contrast, caused pupils to dilate, the classic fight-or-flight response. This held even when researchers controlled for how arousing the images were.9PubMed Central. Pupillometry reveals the physiological underpinnings of the aversion to holes
Heart rate data adds another layer. When people who score high on the Trypophobia Questionnaire view cluster images, their heart rate and heart rate variability both increase, while people with low scores show no such change.10Journal of Affective Disorders. Trypophobia: Heart rate, heart rate variability and cortical haemodynamic response So the people who report feeling disturbed by these images are not just being dramatic; their bodies are responding in measurable, physiologically distinct ways.
Why Clusters Bother Us at All
Researchers have two main ideas about why evolution might have wired humans to find clustered holes aversive, and the evidence increasingly favors one of them. The leading explanation is the disease-avoidance hypothesis: clusters of bumps and holes resemble the skin lesions caused by parasites and infectious diseases. People with trypophobia, as well as people without it, report aversion to disease-relevant cluster images like skin covered in ticks. The difference is that trypophobic individuals also react strongly to harmless cluster stimuli with no connection to disease, such as a lotus seed head or an aerated chocolate bar.11Cognition and Emotion. Disgusting clusters: trypophobia as an overgeneralised disease avoidance response On this account, trypophobia is an overgeneralized version of a normally useful instinct to avoid skin pathogens.
A related framing calls this the “involuntary protection against dermatosis” hypothesis, which proposes that the brain automatically reacts to visual patterns resembling diseased skin and that trypophobia represents an excessive version of that automatic response.12PubMed Central. Involuntary protection against dermatosis: A preliminary observation on trypophobia An alternative theory, that the aversion evolved because certain venomous animals display similar patterns, gets less support from the emotional data since the response is dominated by disgust rather than fear.
At the visual-processing level, there is something distinctive about the images that trigger discomfort. Spectral analysis shows that trypophobic images contain unusually high contrast energy at midrange spatial frequencies, the same visual property that makes many uncomfortable images hard to look at.13PubMed. Fear of holes When researchers filtered images to isolate or remove these frequencies, the discomfort tracked with whether the offending frequency range was present.14PubMed Central. Trypophobic Discomfort is Spatial-Frequency Dependent In other words, the visual system seems tuned to flag a particular kind of pattern as potentially dangerous, and trypophobic images consistently hit that frequency sweet spot.
What the Brain Shows
Brain-wave studies using EEG confirm that trypophobic images get special treatment in early visual processing. In one experiment, trypophobic pictures triggered a stronger early neural response, comparable to the response elicited by images of venomous animals, and both were significantly stronger than the response to neutral images. People who scored higher on the TQ showed even larger responses, meaning the brain’s early alarm system was tuned to cluster patterns in proportion to the person’s self-reported sensitivity.15PubMed Central. Enhanced early visual processing in response to snake and trypophobic stimuli
This early-processing finding suggests the reaction is not something people talk themselves into. The brain flags these images as salient before you have time to think about what you are seeing, much like it does with snakes. Whether you then feel disgust, anxiety, or nothing at all depends on where you fall on the trypophobia spectrum, but the initial neural ping happens fast and appears to be somewhat automatic.
Who Is More Likely to Be Affected
Several personality traits and psychological characteristics predict higher trypophobia scores. People who score high on neuroticism, who are more prone to anxiety in general, and who are more sensitive to disgust all tend to report stronger trypophobic reactions. Conscientiousness, by contrast, is associated with lower trypophobia scores.16PubMed Central. An exploration of the nomological network of trypophobia This fits the picture of trypophobia as a condition that shares psychological real estate with anxiety and disgust sensitivity rather than being an isolated quirk.
Self-reported psychiatric conditions also overlap. In one survey of people who identified as trypophobic, about 19% had been diagnosed with major depressive disorder and another 9% suspected they had it. For generalized anxiety disorder, about 17% had a diagnosis and roughly 12% suspected one.17PubMed Central. Trypophobia: an investigation of clinical features These are self-selected respondents, not a random population sample, so the rates should be interpreted carefully. But the pattern suggests that trypophobia rarely exists in a vacuum. People who experience it often deal with broader anxiety or mood difficulties as well.
Does Culture Matter
Trypophobic discomfort appears across cultures, but the intensity may vary. A study comparing people living in urban settings with those in less urbanized ethnic minority regions of China found that both groups rated trypophobic images more negatively than control images, but the urban group showed a much larger effect.18PubMed Central. Trypophobia as an urbanized emotion: comparative research in ethnic minority regions of China The researchers framed trypophobia as potentially influenced by urbanization, though the study was small and it is hard to separate urbanization from dozens of other variables. Still, the finding is provocative. If trypophobia were purely hardwired, you would expect identical reactions everywhere. The fact that environment seems to modulate the intensity suggests some combination of innate sensitivity and learned amplification.
Is Trypophobia a “Real” Phobia
You will sometimes hear that trypophobia is not a recognized disorder because it is not listed in the DSM-5, the main diagnostic manual used in psychiatry. This is technically true but misleading. The DSM-5 does not contain a list of approved phobias. Instead, it provides general criteria for what qualifies as a specific phobia, and researchers have argued that trypophobia straightforwardly meets those criteria.19PubMed Central. Is trypophobia real? An earlier review noted the same gap in formal recognition but acknowledged the condition’s growing evidence base.20Frontiers in Psychiatry. Trypophobia: What Do We Know So Far? A Case Report and Comprehensive Review of the Literature
The debate over whether trypophobia is “really” a phobia partly comes down to whether disgust-dominated reactions fit the phobia framework, which was historically designed around fear. Since trypophobia’s primary emotion is disgust rather than fear, some researchers argue it might be better classified as a disgust disorder or a variant of pathological contamination sensitivity. In practice, the label matters less than the experience: for people who cannot look at a strawberry without flinching, whether it is formally recognized as a phobia or classified under a different heading does not change the fact that their distress is real and measurable.
Trypophobia Beyond the Eyes
Although trypophobia is discussed almost entirely in visual terms, the experience often extends past what people see. Many individuals report skin sensations when viewing cluster images: itching, crawling, tingling, or a feeling that something is burrowing under the skin. Open-ended reports from trypophobic participants frequently describe these physical skin reactions alongside the visual disgust.11Cognition and Emotion. Disgusting clusters: trypophobia as an overgeneralised disease avoidance response This cross-sensory element fits the disease-avoidance framework well: if the brain interprets cluster images as a sign of parasites, it makes sense that the body would generate protective skin sensations even in the absence of any actual threat. For some people, these phantom skin sensations are actually more distressing than the visual discomfort itself, which is worth knowing if you have been told trypophobia is just about finding pictures “icky.”
The practical upshot for anyone trying to understand their own reaction is that trypophobia is common enough that you are far from alone, physiologically real enough to show up in heart rate and brain scans, and probably rooted in an ancient disease-avoidance instinct that your particular nervous system turns up a few notches higher than average. The prevalence estimates may keep shifting as researchers refine their tools and study more diverse populations, but the core finding is stable: a meaningful fraction of people, likely somewhere between one in ten and one in five, experience genuine, involuntary distress when confronted with clustered holes and bumps.