Map tongue is a superficial, chronic exfoliative tongue infection that appears mainly on the dorsal surface of the tongue. It appears as a round or oval erythema, either single or multiple, and can quickly enlarge or fuse, often resembling the border of a map after fusion, hence the name map tongue. Because of its variable shape and location, it is also known as wandering tongue. It can occur at any age, but is more common in children and less common in adults, and can occur in both sexes. The etiology is unknown. In children, it is associated with indigestion, intestinal parasites, and vitamin B deficiency. In adults, it is associated with anemia, gastrointestinal dysfunction, emotions, and focal infections. It has also been reported to be related to genetic factors. Map tongue generally does not require special treatment and can be observed regularly. Psychological guidance is more important than medication, and the main treatment goal is to eliminate the patient’s fear. Care should be taken to maintain oral hygiene. If the attack pattern of the lesion is related to medication, food, or poor digestion, appropriate treatment can be done under the guidance of a physician. Patients with tingling and burning sensation can use some weak alkaline gargle, such as 2% sodium bicarbonate, 2% sodium borate gargle. It can also be used as 0.1% ezacridine, chlorhexidine gargle, and topical treatment such as ulcer cream, ulcer powder and watermelon cream.