My mother in law had sinus surgery 18 months ago. She said she never did breath as well after that. Today she told us she blew out a very large, pinky size, blood clot just before lunch. It has been bleeding for five hours. She s kept a tissue plug in, changing frequently. I had keep one for an hour to see if it was interpreting clotting to keep changing. She also has dementia, so it s hard to know the exact details before my husband picked her up at one. Should we take her to an er?