Yellow Yellow mucus indicates your immune ... Small amounts of blood are usually not a cause for concern. Brown or orange Brown or orange mucus may result from dried blood mixing with mucus ...

According to Dr. Joydeep Ghosh, Consultant, Internal Medicine at Fortis Hospital, Kolkata, “Yellow or a little greenish phlegm is a warning sign of bacterial infection. Dr. Ghosh advises ...

Additionally, if your nasal mucus turns yellow, it means your immune system ... it is usually nothing to worry about. Brown or orange Brown or orange mucus can occur when dried blood gets ...