Kelocote and silicon strips are fantastic for improving the appearance and texture of scars, but for a hypersensitive scar what you need to do is massage it, touch it, and desensitise your brain to how it feels. Touch a normal bit of skin, then the scar and think about how it feels difference. Stroke normal then scar with things like cotton wool, flannels, tooth brush, fabric and again think about it.
Its a long process, and not pleasant, but it does work as where the nerves were cut they will be sending back funny information, and your brain needs to ignore that and reintegrate that area in its view of normal.
I went through a lot of this therapy after a nerve injury and developing a chronic pain issue due to that. I also have some nasty scars in that area due to surgery, one of which became a keloid