A small percentage of the population is born with preauricular sinus, a small hole around the outer ear. Here’s why the hole exists.

It is usually where the face the cartilage meets. It is technically a birth defect. It was first documented in 1864 by Van Heusinger. According to an evolutionary biologist, Neil Shuban, he said this hole could be an evolutionary remnant of the fish gills.

Generally, having a preauricular sinus is no big deal. However, should the sinus become infected of form a cyst, treatment may be required which involved draining the sinus or removing it completely.

Between 1 and 9% of the population of the US are born with preauricular sinus while 3% of the population of the Taiwanese people and 15% of the Africans are born with preauricular sinus.

Often time, preauricular sinuses are passed from generation to the other. Preauricular sinus can occur to a ear of the both. However, research have shown that they mostly appear to the right ear

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I have it, and my children does

Growing up there was this myth that those who have it are very stubborn.