What does it mean when you cough and it taste like blood but there's not any but green mucus?

URI=upper respirator: We used to think/claim that color of phlegm was determined by whether upper respiratory illness (URI) was caused by virus or bacteria. If it was green, yellow, brown, nasty colored, you needed antibiotics whereas if it was clear or white, you didn't. As it turns out, that was just a myth. In fact, color and taste tell us nothing about root cause, just that you're sick. Average duration = 18d.

You Are Ill: You are ill. You have a cough and you are producing purulent sputum. You need to be seen by your physician urgently. That is what this means.

Need to see a doctor: Cough with green mucus is the sign of bronchitis or rhino sinusitis. You should make a visit to a local physician to get proper treatment.