A white coating on the tongue is a common occurrence and is often harmless—but in some cases, it can signal an underlying health issue that needs attention. Whether it appears as a thin film or as stubborn white patches, understanding the causes of a white tongue can help you determine whether a simple change in hygiene will help, or if it’s time to consult a doctor.
Common Causes of a White Tongue
One of the most frequent culprits is oral thrush, a fungal infection caused by an overgrowth of Candida yeast. It typically appears as thick, creamy white patches on the tongue, inner cheeks, or throat. This condition is more common in individuals with weakened immune systems, those taking antibiotics, diabetics, or people who wear dentures.
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