You should ask your doctor about the huge range of skin creams, amde especially for this. Some of them you have to pay for, some of them are over the counter and some of them can be prescribed.
There's also some kind of laser treatment that you can get if the scar really bothers you.
And there's surgery if the scar is particularly bad... I was offered surgery by my doctor, free on the NHS. Doctors tend to do this if they think the scar could inhibit your quality of life in any way.
However, I'd just stick to the creams. There are some good ones, but I couldn't tell you which ones are which.