They're still stumped. They'll never figure out the infection. But the pre-existing cellulitis on my shin may have been caused by a bad vein in my leg (3 ultrasounds and 2 CT scans found nothing, although they were looking mostly for blood clots). Saw the dermatologist and a vascular surgeon today and they don't want me back for a month, so things are probably looking up. But I have no idea how soon I'll be swinging a leg over my scoot.