Phlegm: You surmise correctly that the phlegmis old blood. You may have a post nasal drip and the mucus has eroded the blood vessels in your nose to account for the blood. Try using saline nose drops before bedtime to avoid the problem.
Answered 5/13/2015
5.1k views
A doctor has provided 1 answer
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question