Von Willebrand's disease is a bleeding disorder in which a protein in your body's blood system is missing or does not work well. The protein is called von Willebrand factor. If the von Willebrand factor is working properly, it helps your blood clot. Clotting stops the bleeding when you are cut or injured.
The von Willebrand factor usually carries another blood-clotting protein called factor VIII. If you have von Willebrand's disease, the two proteins may not attach properly to each other. Your blood will not clot as well as it should.There is no cure for von Willebrand's diease.