Trypophobia
Trypophobia is not a real phobia. Look at the official list of phobias, and this is not even on there. This is a word 4chan made up back in the day that ended up spreading to various parts of the web.
It is however a very real and natural reaction. Your discomfort (e.g. skin crawling, shivering, nausea, etc.) is an automatic reaction of the sympathetic nervous system known as horripilation. This, like goosebumps, are a legacy genetic trait that serve to protect us as a ‘fight-or-flight’ response to imminent threat. This sudden onset of sympathetic nervous system responses in your body are the result of a complex process in your brain that takes place when you visually analyze flawed organic texture.
There is a region on your brain called the somatosensory cortex which, just like the other cortical regions, is in charge of performing the higher level interpreting of the nervous signals that it receives from the thalamus.
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