It's tough to pick the most compelling reason for adding sinus balloon surgery. For one thing, more than 37 million Americans suffer from sinusitis, and at least one-quarter of those sufferers are candidates for this procedure, so there's no lack of patients. For another, it's not just minimally invasive, it's minimally damaging: Many patients don't need any pain meds and almost all can return to work the very next day. Finally, there's more financial upside to the sinus balloon treatment than to traditional sinusitis procedures.