It’s likely you’ve come across someone with a tiny hole above one or both of their ears. It usually appears at the point where the ear cartilage connects to the face, and might look like a lump or a dent. About one in 100 people have them.
They’re called preauricular sinuses, and for the most part, they’re entirely normal. Interestingly, according to evolutionary biologist Neil Shubin, the holes could be an evolutionary remnant of fish gills.
Didn’t know this. My son have one of these in his right ear. It’s called Preauricular Sinus and is harmless! pic.twitter.com/ZJrKzTyqpZ
— grudev (@grudev) November 21, 2016