It's not uncommon for me to see blood in my sputum in the morning, but it's a very minimal amount. "Streaking" I would say. Since my doc put me on advair this has decreased somewhat. Also, I noticed when I stopped taking ibuprofen so regularly, it decreased as well.
Slightly more significant bleeders might happen maybe once every 6 months, but there has never been more than maybe 1-2 milliLiters. Typically they happen when I'm about to go to sleep. I'm not entirely sure where the blood is coming from. It may be lung, but it also seems like it might be from way back in the sinuses. I guess given that advair has helped, it's probably from the lung.