My son is 19 years old, and otherwise very healthy. He has had a productive (clear mucus) for over a year. He hacks up loogies (gross!) about 30 times an hour. I feel so bad for him, We continue to go to the pulmonologist with no luck. He's been diagnosed with asthma, tried inhalers, allergy medicine, steroids and antibiotics. Nothing has helped and I'm about to go crazy. It just doesn't make sense. If anyone has any suggestions I would be so grateful. Thank you!