Possibly mild eczema, possibly superficial
brokenBroken bone
Broken or knocked out tooth capillaries that appear for no special reason and last for some time (Schamberg's Disease is the official name, if you want to look at pictures.) Doesn't sound worrisome, but you'll need to see a doctor in person to know for sure. I suggest you wait 4-6 weeks, though, since the rash may go away by then and you won't have to bother.
Best.
Dr. Rockoff