DergiPark: 439218tmsjAims: The aim of this study is to present a case of an infection in the oral cavity due to tongue piercing perforatedinto the floor of the mouth, thus to raise concern over the increasing popularity of tongue piercing in spite of its risksincluding perforation in the oral cavity and oral ulcers.Case Report: A sixteen-year-old female patient presented to the clinic with lesions and extreme pain in her oralcavity. The thorough examination showed displacement of the piercing through the tongue, causing a perforation ofthe floor of the mouth. The piercing was surgically removed. The ulcers were treated with medication. The patientwas advised to get professional help and was instructed to pay close attention to oral hygiene in case of reiterateddemand for tongue piercing.Conclusion: It is important to ensure that piercing is inserted by a specialist under sterile conditions to preventcomplications. If a surgical operation is needed to treat the complications occurred, the clinicians must be aware ofthe critical veins and nerves that are located in the oral cavity and they should be very careful not to cause any harmduring the operation