I have petechiae on bilateral lower extremities ( ankle to mid calf), this is the third erruption since late January. Medical history: PLIF/6-2010, Tonsillectomy/2-2011. Is this serious, I have an appointment with a vascular specialist in 2 weeks, I saw this Dr. in January w complaints of popliteal pain, heaviness, and right calf pain, did blood work for thrombus (negative), should I be concerned or just wait for appointment. My fear is there will be no petechiae, as this physician seem to believe the problems with my legs were associated with my recent back surgery.