Bloody phlegm: Bloody discoloration in phlegm generally comes from small hemorrhages from blood vessels of the respiratory tract (from sinus to lungs) that are caused by inflammation, infection or trauma due to coughing or forceful blowing. Antibiotics are often used to treat infections that progress to this stage.
Answered 10/7/2018
3.8k views
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question