Is this still in healing process or it could be a scar. What should I do? Do I need an check up appointment or I have to wait mo I had treated age spots 2 1/2 weeks ago with liquid nitrogen. The scabbing fell off in 5 days. Now, the treated spots turned

I . I would recommend that you follow up with your dermatologist since you are concerned. After treating with liquid nitrogen, there can be some hyper pigmentation. But, this could be some residual lesion, simple slow healing, or hyper pigmentation. Difficult to tell without a picture. I hope that helps a little.