If it is a keloid or raised scar you can use a silicon sheet product to flatten it and lessen the redness.
If the scar is already flat you might look into using Retin A on it or even needle rolling.
I had an adhesion after my trach shave. The skin bonded with the muscle and when I swallowed my neck skin pulled downwards. It was awful and caused me a lot of social & job problems which I still suffer from. It finally went away on it's own.
I have a lot of FFS scars that I have faded by using aspirin & yogurt facial scrubs, alpha hydroxy acid and occasionally retin A. I used Retin A to fade the vaginoplasty scars and though itchy and burney it really helped (on my outer labia) do not use internally.
I have done about six needle roller treatments on my face and am presently recovering from the last one, the needle roller is miraculous in my own experiences, that and a good vitamin C serum before moisturizing is amazing. I make my own vitamin C serum with Ball Fruit-fresh powder from the canning or spices/pickling section of the grocery store. I also add some AHA but I have been doing these sorts of things for years now. My mom can't believe when I don't have makeup on, she thinks I have makeup on and is always asking me what I am doing for my skin.
I also take vitamins and supplements for skin health and I try to eat blueberries, pomegranate and Resveratrol every day