Can you suggest best treatment for itchy scar left from second degree burn on my daughter? (photo)

My baby had an accident when she was 18 months Old. She had second degree burn in her chest area. After healing it left a very bad scar of palm of hand size..I can see that the scar is shrinking, but it s itchy sometime and she is scratching herself. Can you suggest a best treatment for getting rid of this scar.

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