My tongue became white suddenly after taking dental treatment few days back.whiteness is not going after brushing.i consulted e.n.t specialist on the advice of dentist.he prescribed zincovit,lukatas FX,gum paint & mucaine antacid.After taking medicine for four days whiteness of tongue reduced upto 50% in the day but at night it again became white.why it became white at night.Shall I continue with medicine or consult any dermatologist for further treatment.Please advise.