Should the Invisalign Tray Edges Be Sharp?

I don't see much problem with a nail file done at home. The effort is the same, whether it's with me or done by the patient.
Often it is the first few that feel this way, the tissues adapt and all future aligners feel fine.

They should not be
sharp but sometimes this can occur during the process of fabrication. If you
use a nail file, you can smooth down the edges very easily.

Occasionally we will get an aligner that is sharper than it should be. It is simple to fix. Just bring it back to your dentist and ask them to polish off the sharp are. If this happens in futrue aligners make sure you tell your dentist and he can smooth them all out.

If you can not get back to your dentist then very gently smooth the area with a fine nail file being careful not to crack or split the aligner.