What should I do next if my tongue has turned slightly white and hasn't improved after using Zincovit, Vitamin C, and Listerine mouthwash, and could this symptom point to any serious health issues?
A white tongue is very common and rarely points to anything serious. It is often just a buildup of dead cells and debris, or sometimes a mild, easily treatable yeast overgrowth called oral thrush. Since your multivitamin (Zincovit), Vitamin C, and Listerine haven't helped, I recommend stopping the strong mouthwash, as it might cause further irritation. Instead, gently brush your tongue with a soft toothbrush and stay well-hydrated. Please visit a healthcare provider or dentist. They can easily examine your tongue and prescribe a targeted treatment, such as a mild antifungal rinse, if necessary.