black hairy tongue

**black hairy tongue**

Black hairy tongue is a harmless oral condition characterized by a dark, furry appearance on the top surface of the tongue. This occurs when the tiny projections on the tongue, called papillae, become elongated and trap bacteria, yeast, and debris, leading to discoloration that can range from black or brown to green or yellow. Common causes include poor oral hygiene, smoking, certain medications, excessive coffee or tea consumption, and dry mouth. While it may look concerning, black hairy tongue is typically painless and treatable through improved oral care and lifestyle adjustments.