I wake up with tiny marks on my body. they are scabbed over. what is it?

Bites?: It's possible that you might have a bed-bug infestation. They can live in your bedding, mattress, or carpeting, and are nocturnal. They emerge at night and look for a host for a blood meal. Fortunately, they don't typically carry diseases, but they can be a nuisance. Inspect the bedding for small reddish bugs. Also consider mosquitos and fleas as a culprit.