<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I think I have Raynaud disease. My fingers and toes turn white or blue when I am cold or stressed.  <response>: Alright, in order to diagnose Raynaud disease, we will need to perform some medical tests. We will start with a complete physical skin exam, followed by a hematologic test and a CBC. In addition to this, we will also perform an ultrasound, an echocardiography, a lipid panel, and an examination of the breast. 