Milk produces mucous

Preliminary scientific work suggests that this widely held belief is false. Drinks or foods which themselves are thick, sticky or viscous may increase the mucous feel of the mouth. Again, this need not be a health problem. Whether some individuals may be peculiarly and locally sensitive to milk or dairy products does not seem to have been scientifically substantiated. Some people think that a 'mucusy' mouth and upper airway is a health problem. It may be a normal condition.