A member asked:

Can inflammed sinuses cause minor blood in sputnum and not in nose when blowing?

A doctor has provided 1 answer

Yes: The nasal mucosa (skin inside the nostrils) has many, many blood vessels that are prone to breaking from trauma or inflammation. A sinus infection, allergies, or even dry air can cause minor bleeding. For anything persistent or heavier flow, see your doctor.

Answered 9/22/2018

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