As the scabs form randomly without any history of any injury,so these can be due to bites from bed bugs or mites.As they are non itchy,so scabies is ruled out.I would suggest that your sun dry your mattresses for few days and if still the symptoms persist then pls get it evaluated from a dermatologist.
I hope that helps.Take care and pls do keep me posted on how you are doing or if you have any additional queries.Kind regards
Thanks for your response. Knowing people who have had bed bugs, we have pretty much ruled this out and after looking at mite bite pictures, I'm not sure that would be the cause either.
Instead of a sore like mark, these are mild abrasions (half the size of a pencil eraser) without any redness or inflammation on the surrounding skin.
If indeed it IS some critter under the covers, he's not very hungry because the marks appear at a low frequency.
My concern is more along the lines of an allergic reaction or contagious skin condition. It might help to know that over the last month, we have began taking vitamins and supplements in addition to our regular diet.