I checked a couple of sites, and it seems there are some treatments for collapsed lungs...NMM, I hope you don't need any of these and that your lungs are all better soon!
Treatment list for Collapsed lung:
The list of treatments mentioned in various sources for Collapsed lung includes the following list. Always seek professional medical advice about any treatment or change in treatment plans.
* Chest tube - to release trapped air.
* Pain medications
* Watchful waiting - for very mild cases of partial lung collapse.