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Well the treatment depends upon the look of the scar.If it is raised you would need a injectable treatment .If it is flat and ugly looking then probably a laser surgery
If it is depressed the a filler injection.
I don't think any surgery would help you here ,because any surgical intervention would again leave a scar there.
I being a laser specialist ,can suggest you not to go for any laser ablation
also ,as such lasers don't work good below face region.
So,its better too leave as it is ,but any way if you can describe me the look of the scar then I can suggest you the best option if any.