Your body produces mucus naturally to protect your respiratory system, and under normal circumstances, this protective fluid remains clear and relatively thin. However, when mucus suddenly changes to ...

When you're sick you'll often produce more phlegm, and might notice it's thicker or a different color: white, green, yellow or maybe even brown. We all produce mucus, even when healthy. Mucus is a ...

Medically reviewed by Mary Choy, PharmD Key Takeaways Thick mucus in the throat can be caused by infections like colds, ...

Most of us would rather not dwell for too long on the subject of mucus. We know it is there, quietly lubricating our insides and presumably doing vital work. It is only when we have a cold that we ...