Symptoms

Signs and symptoms of black hairy tongue include:

• Black discoloration of the tongue, although the color may be brown, tan, green, yellow or white
• A hairy or furry appearance of the tongue
• Altered taste or metallic taste in your mouth
• Bad breath (halitosis)
• Gagging or tickling sensation, if the overgrowth of the papillae is excessive

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
• Black hairy tongue persists despite brushing your teeth and tongue twice daily