<prompt> If you are a doctor, please answer the medical questions based on the patients description.almost 7 months ago I was diagnosed with pneumonia. Since this time, but not before, I cough up greenish mucus all morning. The mucus has no blood but taste metallic like blood. Should I be worried? I havent been back to my doctor since. Should I go?  <response>: Hi welcome to Chat Doctor... You are having green colored stained phlegm ... So its not normal... Post nasal Chat Doctor. ... For that physical examination and auscultation is first indeed... If abnormal than further work up done with digital chest x-ray if rales or rhonchi heardIt might be bacterial infection for which antibiotic course given... If still symptom not improves than sputum culture and cytological examination done ... Take care Advise : pulmonologist consultation for examination... 