Inadequate intake of fluid cause dehydration
Certain infections like thrush can cause white coating over tongue and lead to bad breath.
Halitosis can also be Secondarily becm geographic tongue
In which taste buds overproduce keratin and form groove ND fissure
over dorsal surface of tongue.
from this clean tongue everyday
Rince the oral cavity with mouth wash
Brushing twice a day
Take multivitamins supplements