Trypophobia is an aversion or fear of clusters of small holes or repetitive patterns, which can trigger feelings of discomfort, anxiety, or nausea in some individuals. Common examples include images of honeycombs, coral, or certain plant surfaces. Although not officially recognized as a mental disorder, many people report experiencing strong negative reactions to such patterns. The exact cause of trypophobia is not well understood, but it may be linked to evolutionary responses or sensory processing issues.