Sensori neural deafness

Hi I just found out my ten year old suffer with this. The hospital told me my son hearing will go as he grow up . Is there any thing that will get my son hearing back . Is there any operation that he can have . I was wondering if u would be able to say what cause this as the hospital told me they don't know ? My son had grommet when he was a baby was he had (glue ear ) before they found this out. . He has hearing aids Thank

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