What does it mean when there are blood streaks in phlegm?

Dec 13, 2021 Source: Cainiu Health
Disease description:

I’ve consistently felt phlegm in my throat. Every morning after waking up and brushing my teeth, I cough and notice blood streaks in the phlegm. What could be causing blood streaks in the sputum?

Doctor's answer (2)
Dr. Wang Shishou
Blood streaks in sputum may result from conditions such as chronic pharyngitis, gingivitis, gum injury, or upper respiratory tract infection. For now, you may monitor the situation closely. However, if the symptom is severe or persistent, prompt medical evaluation and treatment at a hospital are recommended. Additionally, pay close attention to your daily diet: avoid spicy and irritating foods, drink plenty of water, and consume more fresh fruits and vegetables.