This document presents a case of an 18-year-old female patient who frequently bites her cheek. She has mild gingivitis and Angle's Class I malocclusion with unilateral crossbite. Her treatment plan involves non-surgical therapy like scaling and root planing followed by corticotomy to assist rapid maxillary expansion between teeth 14-17 and 24-27. Proper oral hygiene instructions and maintenance therapy are also included.