Bama, petechiae can be a side effect of prednisone, especially if you've been on it a while and your skin is fragile. But it can also be a symptom of small-vessel vasculitis (inflammation of the blood vessels) or a low platelet count, which can cause bleeding into the skin. Both these problems are pretty common in lupus. So if this is something new, you really need to let your doctor know about it. I'm not sure there's any way to know if it's prednisone or lupus-related without some blood tests. You might want to try contacting your doc soon, before all the offices close up for the holidays.