could be spiders, if you don't want to spray with pesticides in your bedroom peppermint oil works great to deter spiders. Clean your room really well, including in closets and under the bed then dribble a little peppermint oil around baseboards and windows it will keep them out :)
fleas. is possible I have had that problem spray around the bed and dressers with regular vinager with water fleas hate vinager. and wash all your bedding in hot water. unless of course its some kind of lice or spiders and spiders hate vinager too.
What I did is get about 12 smoke insecticide canisters from my local hardware store. Went to a very long dinner and shopping with my family. Came back and problem was solved. It is overkill, but I have no problem with that.
Skin so Soft works well against biting insects and is good for your skin. You can also treat your mattress with diatomaceous earth. Just sprinkle lightly directly on the mattress, rub it in, then put the sheet back on and sleep on it for a week. Then vacuum. This will kill even bed bugs so they say
When I thought something biting me it was a reaction to something. In either case take all the bedding off, mattress pad included, and wash it in the hottest setting the fabric will take. Vacuum your entire room including under the furniture, the mattress, and use the crevice tool to get into all the corners. You can sprinkle Diatomaceous Earth in the corners. It is all natural, nontoxic powder that kills bugs.
Spiders maybe, they're also very commonly found in beds.. It's weird but true. A few years ago when I was in 6th grade I would go to school and find random bite marks and I found out it was a spider that had laid eggs in my room! ICK!
My grandchildren had little,itchy, bites on them; they got sorta spotted like chicken pox. Turned out that they had contact with another child that had scabies. If the bites are itchy, I would suspect scabies. They have cream that was prescribed for them, all better now!