Normal Variation: For many, it’s just a natural thing and might even be hereditary.
Dehydration: Not drinking enough can make the tongue dry and cracked. Drinking more water can fix it.
Geographic Tongue: Sometimes it comes with cracks that can change over time.
Nutritional Deficiencies: Lack of vitamins like B12, iron, or folic acid can cause tongue changes, including cracks.
Autoimmune Disorders: Conditions like Sjögren’s syndrome that affect glands can lead to a cracked tongue.