Nothing!
EDIT:
Well, everything is possible in today's society. You can not make your tounge "grow" but you can always get it surgically slitted like Gene Simmans did.
There are no hair follicles on the tongue.
No it will not.
No, every part of your body ceases to grow after you are dead.
Your perminant teeth stay like that forever.
Not directly, but taking any antibiotic can create the conditions for fungi to grow.
no
Tongue tied toffees.
There are no hair follicles on the tongue.
No it will not.
No it doesn't grow back.
If the tongue suffers severe damage. This is the kind of damage beyond tongue piercing, for example. The tongue contains a regenerative feature that allows the tongue to grow back into its original form with little scar tissue.
No, hair does not grow on the tongue. The surface of the tongue is covered in papillae, taste buds, and lingual tonsils, but it does not have hair follicles like the skin on the rest of the body.
There are no hair follicles on the tongue.
No, every part of your body ceases to grow after you are dead.
I'm pretty sure you can't....
Your perminant teeth stay like that forever.
earing popsicles.