Demodex tend to live about two weeks. One study reported that the mites lay their eggs inside the follicles or oil glands. They hatch after three or four days and develop into adults in about a week.

The eggs end up in one of two places depending on the species of face mite. The first species, called Demodex folliculorum, lays its eggs in your hair follicle. While the second prefers nesting in ...