What your mucus says about your health?

When mucus produced from a cough contains blood, it raises concern. But people with simple bronchitis can cough up a few specks of blood. Coughing up clots of blood or persistent bloody mucus may indicate a serious problem and requires medical evaluation. People often believe that green mucus means a bacterial infection. That is not a reliable indicator. White cells that are fighting a viral infection can turn mucus green or dark yellow.