Can emphysema go away?

Emphysema is mostly managed. But in case of deficiency of a particular type of enzyme, called alpha-1-antitrypsin, enzyme replacement therapies are often helpful. Cessation of smoking is one of the most effective changes that can be brought, which help in managing emphysema to great extents.

No, emphysema is chronic and progressive. The disease never goes away, but usually worsens.