Usually my dctor or nurse ,whoever fills out the sheet asks. I have been coughing up blood for years, usually small amounts like a teaspoon or 2 maybe a tiny bit more. But as someone who has had a massive bleed i'll tell you this.... I had very obvious signs that a big bleed was on its way and ignored them. I hadnt had a bleed in 9 months then one day i had about a teaspoon come up. Then the next day same thing. This went on for one full week each time being a little more in volume than the last. Then one night i layed down to go to sleep and felt the gurgle and this time the bleed was much bigger, more like about 3- 4 table spoons ( i didnt measure it but it was a good amount that should have scared me into calling the Dr. right then and there). I just spit it out in a can that was next to me, rolled over and went to sleep. Next night while sleeping i rolled over on my left side and Whammo, the blood was coming and it was a LOT. I called 911 and got myself to the hospital. I didnt write this to scare you, i'm writing this to let you know, if you are seeing it go on every day for too long, or increasing amounts each time, you may want to call your Dr. Don't ignore the signs if they are there, or even if you think they are there. Better safe than sorry.