Is it still possible to remove childhood scars/patches on my legs? (photo)

Hi, i have these "scars" on my legs eversince, but i really dont remember having wounds at the first place. There are patches on my legs and now on my arms too (but not that noticeable, unlike my legs) . This has caused me low self esteem. I wanted to know what are these and how can I remove these please. Thanks in advance.

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