Old blood: Hard to say for sure. Likely old blood from your coughing. If it persists, or you have any other symptoms (pain, swelling, etc), see an ENT doc for examiation.
Answered 10/3/2016
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3 doctors weighed in across 2 answers
3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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