Green phlegm from lower airway for 2 wks. no congestion & very mild cough. clear chest ct a month ago. small blood streaks this am. cause for concern?

Green Phlegm: Anytime your secretions are green it indicates a possible infection... See your doctor.

See doctor...: Coughing blood is called hemoptysis and it always requires an evaluation by a doctor. The most common cause is bronchitis but malignancy can also cause it and it should be ruled out. Chronic bronchitis, a form of copd, can cause the symptoms you describe and this also requires an evaluation by your doctor for diagnosis and treatment. If you are a smoker, you need to quit! see your doctor asap!