Hi My child is 4 years old & she has tooth ache, her right side big tooth is badly rotten its falling in pieces & its full of cavities so do i have to do treatment for her or need to wait as her all teeth will fall in nearby in sixth year. If need to go for treatment what treatment i have to do? & if need to wait for the teeth to fall & new teeth will come but that new teeth will come properly or it will get effected by cavities??