The mites that cause scabies are tiny parasites, smaller than a pinhead. They are usually picked up by direct skin-to-skin contact with someone who already has scabies, and only very rarely from objects such as clothing or bedding.
The most memorable and emotionally powerful dreams happen during the REM (rapid-eye movement) phase of sleep, which is the stage of sleep when our brains are most similar to a wakeful state.
There are, however, a great number of theories being explored. While some scientists posit that dreaming has no direct functionâbut instead is a consequence of other biological processes that occur during sleepâmany studying sleep and dreams believe dreaming serves a primary purpose. Theories of dreaming span scientific disciplines, from psychiatry and psychology to neurobiology.