I haven't so far had any organ involvement, so when I was in bed with a recent flare and also had discomfort in my bladder (aching burning/cold sensations with urge to pee a lot) I assumed it might be a urinary infection. My GP thought that was likely, and I'm on the last day of a 3 day course of anti-biotics, but this hasn't shifted it. The urine test also came back negative. Is it possible that the lupus flare has inflamed my bladder? I'd not heard of this before, so was curious if anyone else has. I plan to go back to my GP.