I think what you're describing is petechiae.
Quote:
Etymology:New Latin, from Italian petecchia, ultimately from Latin impetigoDate:circa 1784 : a minute reddish or purplish spot containing blood that appears in skin or mucous membrane as a result of localized hemorrhage
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I had aplastic anemia a few years ago and when I finally, after a month or so, was conscious enough most of the time to know what was going on, was horrified to find my entire body covered in those things.
BTW, at a couple of points during my 5 weeks in the hospital, I had a platelet count of 2,000 (normal adult range 150-450,000).
http://www.mayoclinic.com/health/petechiae/HQ01208
Please do get checked out. I kept putting it off, despite feeling worse and worse, and if a friend hadn't insisted on taking me to the ER, I wouldn't be here right now to tell the tale.