if my issue is resolved do I have to keep going back to a medical specialist?If my medical issue is resolved do I have to keep going back to a medical specialist?

I had sores on my tongue
probably cause by the 60mgs of Prednisone I was on for 9 months due to a much worse condition. I've been of of it for three months and the sores are gone. His office keeps calling about me coming in again.

Do I have to keep going back?