I have constant itching no rash especiallt at night. what can be causi.g this. i take benedryl and you anti-ich creams , doesn't help. it seems like a get a sharp stung and then itchibg.?

Allergies: Itching can be caused by a variety of reasons most commonly allergic in nature, perhaps your using a night time cream or something about where you sleep could be causing this try sleeping somewhere else to see if there is a pattern.

Bed bugs?: You might have bed bugs. Bed bugs are elusive and usually nocturnal, which can make them hard to spot. They often lodge unnoticed in dark crevices, and eggs can be nestled in fabric seams. Closely examine your bed sheets, etc for sign of an infestation.