What is clear phlegm with brown spots?

Clear phlegm with brown spots can indicate the presence of blood or other particles, which may be due to various factors such as irritation, infection, or environmental pollutants. The brown color often suggests old blood, possibly from nasal passages or the throat. It's essential to monitor any accompanying symptoms, such as coughing or difficulty breathing, and consult a healthcare professional if the condition persists or worsens.