Recently, researchers have begun to think about insomnia as a problem of your brain being unable to stop being awake your brain has a sleep cycle and a wake cycle—when one is turned on the other is turned off—insomnia can be a problem with either part of this cycle: too much wake drive or too little sleep drive.
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Blood tests for herpes simplex virus type 2 HSV-2 , the most common cause of genital herpes, are available.