I'm constantly coughing up mucus. What can I do?

Constant mucus. Mucus is a thick fluid secreted by glands that helps protect areas of the body exposed to the environment. It filters away particles and organisms that stick to it; it also contains antiseptic substances that prevent infection. Mucus production in the lungs increases in response to allergens (pollen, molds) & irritants (smoke). A chronic cough producing mucus should be evaluated medically.
See doctor... Possible etiologies of a chronic cough include chronic bronchitis, a form of copd. Other possibilities include bronchospasm from any cause, gerd, post-nasal drip or a combination of these diagnoses. For diagnosis and treatment, you need to be evaluated by your doctor. If you currently smoke, you need to quit today!