When you're sick you'll often produce more phlegm, and might notice it's thicker or a different color: white, green, yellow ...

So essentially, yellow mucus just means your immune system has been activated. For signs your cold is getting better, look for: The mucus turning clear again ...

“When the mucus becomes yellow it means that immune cells called neutrophils have activated in your body and are fighting a local infection,” explains Dr. Carleton-Nathan.

It’s produced by special cells within the epithelium. This is a tissue that lines the organs, cavities and surfaces in your ...

Snot plays a powerful role in protecting us from disease – and its colour alone can provide insights into what's going on in ...

A cold only lasts a short duration and is not accompanied by a fever, unlike a sinus infection. A thick, green or yellow mucus also is an indicator of a sinus infection.

If the mucus is dark green or dark yellow, the infection has worsened. You may need to visit the doctor. Posted 11:37 a.m. Mar 15, 2023 - Updated 12:33 p.m. Mar 15, 2023 ...

Yellow/Green The last time you or your kid came down with a cold, you may have noticed that your boogers were yellowish green ― that’s pretty common when you’re sick.

Sometimes after a cold ends, these cells remain in the airway and keep it inflamed, which is why coughing can continue after infection, said Dr. Amy Dickey, a pulmonary and clinical care doctor at ...

“While all phlegm is mucus, not all mucus is phlegm,” Srinivasan noted. “People often use these words interchangeably, but it’s more accurate to think of phlegm as the thicker, usually colored mucus ...