mucus gets produced which has unusual color such as dark yellow, green or brown.
Post nasal drip
A buildup of mucus in the throat is often called a post nasal drip or post nasal discharge. The American Academy of Otolaryngology explains that excessive thin mucus secretions caused by irritation, colds, allergies, or hormonal changes can cause more mucus to flow down the throat. Or sinus infections and dryness in the throat can cause a thick mucus buildup in the throat.2
This constant drip of excess mucus in the throat
