Take a look at that picture on the right. It's a lotus seed pod. Does it make your skin crawl and itch? You may suffer from Trypophobia.
Although it's not an officially recognized fear, there's a movement trying to get it officially recognized and people are petitioning for more research.
The 'official' definition for it is that trypophobia is the fear of asymetrical holes occurring either naturally or unnaturally. Some say that the fear comes from the fact that holes in your skin were a sign of disease, and therefore we are programmed to feel icky about those things.
If you want more... extreme examples of this, check out this video. Do not watch it or google trypophobia if you don't want to possibly be disturbed!