what is causing mucus
Causes of Excessive Mucus in Throat: 1  Allergies: 2  The most common causes for mucus in throat are allergies such as those caused by pollens, smoke, pollution and even by food, such as those resulting from lactose intolerance.
1 Smoking is one of the primary causes of excessive mucus production in the nose as well as phlegm in the throat and so you might be aware of the various effects of smoking. 2  Prolonged smoking causes inflammation of the mucus lining and so it triggers increased production of mucus in the nose and throat.
Excessive phlegm or chest mucus is often caused by viral or bacterial infections such as influenza, bronchitis and pneumonia, as well as irritants such as those inhaled during smoking. When infections are treated with antibiotics, the natural balance of the body becomes compromised.