What is the Best Treatment to Help an Open Scar?

when i was 16 i was in a bad car accident that cased me to have tummy surgery. now i have a huge open scar on my stomach. it looks horrrible i would love to have it fixed but need to know how much it would cost as i have 4 kids and moneys tight. its not something that needs to be done just would love to have my normal belly back.

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