2. Excessive Mucus Production
Livestrong.com says having more mucus than normal could point to some lung diseases – namely asthma. This problem is common in America, and is characterized by chronic inflammation of the airways (that can usually be controlled by a prescription inhaler).
Asthma also means increased production of mucus by the cells in the airways, which can further narrow air passages that have already shrunk due to inflammation. Bronchitis, another form of inflammation of the airways, is often a complication from a cold or infection and can also lead to higher mucus production, it adds.