Hi, My Kid Is 6 Years Old, His Tongue Is

Hi, my kid is 6 years old, his tongue is not allow to eat any spicy things, so past 6 years he is eating only curd rice or non spicy food like Idli, dosa, he is suffering a lot. earlier i shown to children general physician they are suggested some riboflavin and vitamin tonics but its not useful.
now whom should i show for this problem, pls suggest me.
Regards,
V.Ramu