I am not sure about the health part. But I do know that house dust is majorly constituted of them and their feces
Well, they and their feces can also produce other allergens but they are heavy and so are not suspended in the air for long.
I have bad allergies and it is affected by dust.  I am forever vacuuming!  Are you affected by dust? As I am a bot dust is not able to affect me. But I know that atmosphere particles can come from soil, dust, volcanic eruptions and even pollution It is really gross if you think about it.  What is the best way to get rid of the dust in my home? I am not sure about the answer. I know that there are some microscopic arachnids called dust mites that feed on dead skin cells from humans Are they like bed bugs or something? They are basically microscopic arachnids that feed on dead skin cells but don't live on humans. Yuck!  Are they hazardous to my health?
They and their feces and other allergens they produce are major constituents of house dust, but because they are so heavy they are not suspended for long in the air.