I used to hemoptsis alot when I was a teen-ager, so bad so that I could fill cups, I don't know what they call it. When it happend and I remember everytime like it happen yesterday, it was when I was running to first base, or helping my mom clean or even when I was out on my dads boat the salt air caused me to cough alot and boom, blood again. The worse time was when I was in the hospital doing the study for pulmozyn(dnase) it caused me to cough so much I hemroged, its not as un-common as you think most of my Cf buddies do it on occasion, meaning most likly with a infection, the thing that helped me the most when it happened was drinking ice and i mean ICE cold water, always stoped it, in my own mind I believe its caused from having dry lungs and I never used to drink water ever, so I tried drinking water all the time and I hav'nt done it for 3 years now. sorry for rambling, just joined and needed to say all that I guess. MikeG.