Black, hairy tongue

Black, hairy tongue is a temporary, harmless (benign), painless oral condition that gives your tongue a dark, furry appearance. The distinct look of black, hairy tongue usually results from an overgrowth of bacteria in the mouth.

Although black, hairy tongue may look alarming, it doesn't cause any health problems. Black, hairy tongue usually resolves without medical treatment.

Symptoms

Signs and symptoms of black, hairy tongue include:

• Black, yellow or brown discoloration of the tongue
• A hairy or furry appearance of the tongue
• Altered taste or metallic taste in mouth
• Bad breath (halitosis)
• Gagging sensation in some people

When to see a doctor
Though unattractive, black, hairy tongue is usually a temporary, harmless condition. See your doctor if:

• You're concerned about the appearance of your tongue
• Your signs and symptoms persist for more than 10 days