Clusters of tiny holes or bumps can spark strong aversion in people with trypophobia, a condition researchers link more to disgust and fear than real threat.
Common textures, such as coral or seed pods, can evoke strong reactions, although the classification of trypophobia is still debated.
Experts point to disease-avoidance instincts and visual triggers, and many viral “trypophobia skin” images are digitally faked.
