Sinus infection is a result of flu, as well as allergies.
The physical manifest of nasal mucosa dripping is nothing but the body's immune defense in high mode.
The physiology of your co-worker's condition is that some kind of bacterial or viral pathogen entered her body and solicited her monocytic-macrophage defense system; which resulted in the hematopoietic production of white blood cells in the bone marrow, a surge of neutrophils, eosinophils, basophils, cytotoxic cells, helper cells, b-cells, t-cells entered the nasal system via diapadesis and is fighting the foreign pathogen.
In response, her body is producing excess nasal mucosa in order to expel the invading microbe, bacterial, virus out of the body.
To augment her natural immunologicla defense, your colleague should take any over-the-counter nasal decongestant as well as take Vitamin C's.
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