Looks similar to what I have had on an off for last 8 years or so. I call them spontaneous blood vessel ruptures caused my Bart destroying blood capillaries (sp)
I'll look up a link to some photos
Lyme damages the endothelial cells and disrupts microvasculature - others in the co-infection class also:
Mycoplasma, Chlamydia - and Bartonella especially - rickettsia too i think
there is also some apparent connection with the autonomic nervous system disruption that normally controls blood vessel constriction and local pressure variances which may be involved in triggering it.