Appearance

• The appearance of a white tongue may vary, depending on the cause. Some people might have a thin white coating, while others may experience a thick covering that looks like cottage cheese.
  
  

Causes

• Your tongue can turn white if you become dehydrated, smoke or if you develop a yeast infection called oral thrush. People with thrush may also experience pain and bleeding along with the discoloration.
  
  

Risk Groups

• People who have diabetes, who smoke or who take antibiotic medications are more likely to experience the symptoms of white tongue. Babies who are breastfed and adults who wear dental appliances are also at risk.
  
  

Treating Symptoms

• Antifungal medications are used to treat a white tongue that stems from oral thrush, according to the Mayo Clinic. Non-yeast related white tongue symptoms may be helped by drinking more water, eating fiber-rich foods and by quitting smoking.
  
  

Prevention

• Limiting the amount of sugar in your diet could help you avoid the symptoms of white tongue, because sugar encourages the growth of yeast. Staying hydrated and smoke-free can also prevent the condition.