@songfeijun I bleed almost all the time from nearly anywhere, doing anything. Walking, sleeping, running, peeing, whatever. So did my father. And his father. Now the Sequencing.com genetic testing shows me to be in the grips of Von Willebrand. I suggest you get at least some strong level of genetic testing done. Get one of your doctors to order it (I hope you have Medicare Plan F). It is very simple. They send you a tube, you spit in the tube and send it back. Some nights I lose up to a half cup of blood. My wife says that is too much, and I need to do something, so I get larger and thicker pads from North Shore. I know of nothing else to do. Well, that and buy a new mattress occasionally. oldkarl