How to get rid of intense burn scar from lighter on arm? (Photo)

I have had this burn scar from a hot lighter and did not apply any creams after except for letting it heal. After a few weeks it inflated and 4 months ago (approximately) i went to a clinic to get shots so it will deflate. I have had this scar for about a year now and i really need to get rid of it as i have self esteem issues when wearing certain t shirts and is quite a displeasing sight to look at.

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