Cracks or grooves on the surface of your tongue are a characteristic of a fissured or geographic tongue. It’s also called migratory glossitis, scrotal tongue or wandering rash of the tongue.

Your doctor or dentist may diagnose you after one look—the appearance is distinct. Strange as it looks, fissured and geographic tongues are widely considered normal tongue patterns. Researchers aren’t sure what causes this condition. The National Organization for Rare Diseases (NORD) says genetics may be a factor.

Fissured or geographic tongue grooves vary in size and depth from person to person. The pattern of the grooves varies as well: from one groove down the middle to multiple deep grooves on the sides of the tongue.

People with a fissured or geographic tongue typically don’t experience any oral health issues from the condition. You may have moderate sensitivities to hot, cold or acidic foods. If you notice any lesions or concerning lumps, contact your doctor. Otherwise, you should be fine.