You can’t see them, but they’re there. They are microscopic mites, eight-legged creatures more like spiders. Almost every human being has them. They spend their entire lives on our faces, where they eat, mate and, finally die.
It looks as if there is something special on our faces that they need. Researchers are still looking to find their diet secrets. They are not harmful to us but they are linked to skin conditions like rosacea.
Studies have found that people suffering from rosacea tend to have more Demodex mites. Instead of 1 or 2 per square centimeter of skin, the number rises to 10 to 20. There may also be a link with the immune system, which normally protects us against infections. When Demodex mites die, their bodies leave waste and bacteria which cause irritation and inflammation.
It is not easy to get rid of them. Even if you kill them off, you’re going to get them again, because they’re everywhere (home, bed, other humans…) and they want to be on your face.
For more details, please check out this BBC article.