A grisly video has been released that graphically illustrates how your bed could be infested with dust mites.
The footage, filmed under a high power microscrope camera by technicians at Ohio State University in the United States, shows thousands of ugly mites crawling on top of each other and in and out of their own faeces.
Dust mites feed on organic detritus. Human skin is a perfect meal for your average dust mite and humans are said to shed over a pound of skin a year on average.
Female dust mites live for up to 70 days and lay 60-100 eggs in their lifetime.
Unlike bed bugs they do not bite, but they can be a cause of a number of allergic reactions and conditions including eczema, allergic rhinitis (hay fever) and asthma.
Solutions include washing bedding regularly at 60 degrees, although probably the best barrier of all is to use a waterproof mattress encasement.