The yellow color comes from the cells — white blood cells, for example.
38+ What Does It Mean When Mucus Is Yellow
Pics. What does green or yellow phlegm mean? When your snot turns yellow, it means your illness is progressing normally.
What Causes Smelly Mucus In Nose & Remedies To Get Rid Of It? from www.epainassist.com
It may be normal mucus that has lost it's water content from dehydration. Not every medical expert agrees that green mucus or yellow mucus is a strong indicator of infection. This coloration is likely due to an increase in the number of certain immune system cells, or an increase in the enzymes these cells produce.
The causes of coughing up yellow mucus.
If the phlegm is due to a lower respiratory infection, it comes up through the throat and is coughed up. One form your mucus can take is a thick, rubbery, solid consistency. Green or yellow mucus doesn't always mean you have an infection. If you see green or yellow phlegm, it's usually a sign that your body is fighting an infection.
