I wanted to put in my $0.02, I have had a horse shoe shaped broken capillary pattern on the last 2 - 3 ribs also a small spot on my right bicep, and one at the base of my SCM near the collar bone. I believe they are from sitting too much folded forward causing pressure and lack of blood to that area. Breathing from the chest seems to be a big proponent of continuous forward folding. Slouching with my shoulders against the back of the chair and my low back on the seat was a common position for me. Much of the way through High School and College I played a LOT of video games, mostly computer at first but then I went on to console. When I say a lot, I mean a lot. Talking about
8 hours+ a day for many years, sometimes extending into 36 or 48 hour stints - though those were extreme and didn't occur frequently. I have since quelled this behavior.
I highly doubt I have Lupus, I normally get over any sickness within a day or so and barely get sick. The key I am trying to work on is pushing the bottom of the rib cage and upper middle chest out and up. Also trying to expose my torso to sun as it hasn't seen it in years. As for the bicep spot? That was my mousing hand, incredible stress for long periods of time on the arm. The neck? The SCM on that side will not relax, due to scoliosis and sciatic pain causing me to shift and turn for long periods. There are also some pretty intense trigger points in those areas too which are maintaining the pressure, tightness and lack of blood flow. I have been trying to address them but there are so many from all this abuse and I work in an office at a computer all day so that isn't helping.
Don't know if that helps any, I have been to doctor's and they have seen this and none have mentioned any kind of lupus.
And I am not saying that this is everyones reason for having them, just that in my experience this has been the case for me and may help those with similar patterns.