Trypophobia is an aversion to the sight of repetitive patterns or clusters of small holes or bumps.[3][4][5] Although not clinically recognized as a mental or emotional disorder, it may nonetheless be diagnosed as a specific phobia in habitually occurring cases of excessive fear or distress.[1][4] Most sufferers normally experience mainly disgust when they see trypophobic imagery, although some experience equal levels of fear and disgust.[4]
As of 2021[update], trypophobia is poorly understood by the scientific community.[3][4] In the few studies that have taken place, several researchers hypothesized that it is the result of a biological revulsion, causing the afflicted to associate trypophobic shapes with danger or disease, and may therefore have some evolutionary basis,[1][4] and that exposure therapy may be a possible treatment.[1]
The term trypophobia was coined by a nameless participant posting to an online forum in 2005.[6] It has since become a common topic on social networking sites.[7]