The absence of white moss in the middle piece of the pediatric tongue is a symptom of wandering glossitis. Wandering glossitis (also known as map tongue) is a superficial, non-infectious inflammation of the tongue, with punctate, circular or irregular patterns of filiform papillae missing as the main symptom, that is, the tongue appears similar to the map-like erythema-like lesions without tongue moss. Wandering tongue inflammation is generally no obvious pain, mostly accompanied by burning pain or mild irritation pain; and its prognosis is good, generally do not need to do special treatment. In addition, must be reasonable diet to avoid spicy stimulating food, and keep the mouth clean, good oral care and so on. Children’s tongue in the middle of a piece of no white moss may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.