#5. If your tongue is wrinkled
It could mean you’re getting older. Fissures and cracks in the tongue are typically harmless, but problems can arise if poor dental hygiene leads to infection within the crevices. Once in a while a fungal infection can develop inside the clefts. Often the infection is treated with a topical antifungal medication. Some dental appliances, like dentures, can also cause indentations on the tongue. Make sure your dental fixtures fit well, drink enough water, and practice good oral hygiene like brushing your tongue.