What does dark red-brown phlegm signify? - Quora

Answer (1 of 4): Visit a doctor. Difficult to say anything without examining you in real life. Microscopy of the coughed out material is also required. Duration of 2 days alone is enough to visit a doctor. Just to assure you, there are many relatively "controllable" diseases, it is not only cance

I woke up this morning with a dark brown mucus upon spitting only the first time, and the rest is clear. Should I be worried? What causes that? - Quora

When you're sick, what does the color of your mucus indicate, if anything? - Quora

Is coughing sputum with a little blood while recovering from an infection a cause for concern? - Quora

What is causing me to cough phlegm with black spots? - Quora

How dangerous is it to have dark brown colored phlegm? - Quora

What are some signs of a serious illness in the mouth? - Quora

Why am I having brown spotting 2 weeks before my period? - Quora

What are the different colors of poop which are not normal for humans? - Quora

How are sputum culture tests done? - Quora

What might cause a brown discharge during the menstrual cycle (before/during/after menstruation)? - Quora

How will I know the difference between a cough caused from my allergies and a cough due to COVID-19? - Quora

Do you cough up blood when stabbed in the stomach? - Quora

Blood is red because of red blood cells. However blood also contains white blood cells. Why isn't blood even slightly white? - Quora

Phlegm Cheat Sheet: Recognizing Normal and Concerning Colors and Consistencies