#9. If your tongue is hills and valleys
A very normal, common condition, “geographic tongue” refers to a tongue that looks like bumpy terrain. Typically harmless, geographic tongue affects between 1 and 14 percent of the U.S. population. Though the cause isn’t exactly clear, it could have to do with taste buds. Taste buds sometimes can randomly shrink away. They can regenerate, so some go away and some don’t. Geographic tongue typically requires no treatment or checkup, but if it becomes painful, a doctor may be able to prescribe an anti-inflammatory steroid paste or antihistamine rinse.