Question

mucus formation is our bodys normal protective mechanism against infections or foreign bodies, which means that whenever mucus is produced, our bodys defenses are working optimally."

Answer 1

Increased or excessive mucus production is the reaction of the lungs to a constantly recurring irritant such as cigarette smoke or air pollution. ... It traps debris and organisms such as bacteria so that they can be cleared, or coughed up, from the lungs.