ReconTeam wrote...
He still hasn't taken off those bandages? Or done something about his face?
Zrvan wrote...
They're probably not bandages, more likely the exterior of the cybernetics.
I always assumed it was a protective covering for the bionic implants on that side of his head.
From the appearance of it, it looks like Garrus lost the ear (or the Turian equivalent) on that side of his head:

I'm guessing the BlueLight Headset is linked directly to the implant on his head.
The facial scars weren't life threatening, so it wasn't a priority to repair them.
Also, the implants that "repaired" Shepherd went under the skin of the face, it may not be possible to implant them on a Turian mandible.