Abstract
Objective: To report the case of nibbled mucosa associated with parafunctional habits and possible anxiety disorder, presenting its clinical characteristics, differential diagnosis and clinical management. Case Detail: A 15-year-old male patient sought care after being referred by the doctor, with lesions in bilateral cheek mucosa, lower lip and right lateral border of the tongue regions. After anamnesis and physical examination, it was observed that the patient had no signs and symptoms of temporomandibular dysfunction, presenting only the lesions in the mentioned regions, caused by parafunctional habit. The therapy indicated for the patient was the orientation to interrupt the parafunctional habits of regression of the lesion, the prescription of ointment for topical application and the referral to the psychology clinic. Discussion: The bite mucosa is described as physical and chronic irritation that can also damage the surrounding regions of the cheek mucosa, such as lips and tongue. Predominantly, the nibbled mucosa is seen in people with high levels of stress or psychologically debilitated. Final considerations: It is important to correctly diagnose these oral lesions as well as the adjustment with an accurate medical history, to guide the correction of parafunctional habits and multidisciplinary monitoring when necessary.