<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing low back weakness, heavy menstrual flow, blood in my stool, nosebleeds and my ears looks abnormal in size and shape, what could be the cause?  <response>: These symptoms could be due to Von Willebrand Disease, a rare bleeding disorder that affects your bloods ability to clot, resulting in heavy or prolonged bleeding. Well run some tests to confirm the diagnosis. 