Medically reviewed by Amelia MacIntyre, DO Mucus, a fluid in your upper respiratory system, is usually clear. But a number of health conditions can cause it to turn brown. Also known as brown phlegm ...

Your baby may pass mucus in their stool as part of the natural digestive process. But certain health conditions, such as an allergy or infection, can also cause mucus in their poop. Because their ...

It may also decrease the severity of cold symptoms, for instance, by easing sore throat pain and nasal congestion. A saltwater gargle can reduce and loosen mucus, which contains bacteria and ...

Nasal mucociliary clearance function refers to the effectiveness of nasal cilia in clearing mucus from the nasal passage toward the nasopharynx. Under conditions when mucus is being over-produced (e.g ...