What is this discoloration that appeared after a revision facelift? (Photo)

That appears to be an area of increased vascular it’s making the skin more reddish purple. Since it hasn’t faded away it may be worth having laser treatment to it.

The area with the least blood supply is the area behind the ear. I try to avoid extending the incision in front of the hairline as it can become visible. Since the blood supply is weak in this area, discoloration and scarring is often times worse here. Lasers (especially to target redness) might help. You can always attempt to reposition scars but you need a substantial lift otherwise scars can look worse.

hi, the picture is very blurry so its hard to tell exactly, however, laser skin resurfacing would be an option to help improve the appearance of scarring after facelift and other types of lasers such as IPL/BBL that can be used to improve pigment over the area.