 Acquired subglottic stenosis generally follows as an after-effect of airway intubation, and in extremely rare cases as a result of gastroesophageal reflux disease (GERD).Subglottic stenosis is graded according to the Cotton-Myer classification system from one to four based on the severity of the blockage.Grade 1 – <50% obstruction 
Grade 2 – 51–70% obstruction 
Grade 3 – 71–99% obstruction 
Grade 4 – no detectable lumen

Treatments to alleviate the symptoms of subglottic stenosis includes a daily dose of steroids such as prednisone, which reduces the inflammation of the area for better breathing.