RecruitingPhase 4Device studyEffects of Photobiomodulation (PBM) on Pain After Presentation of Aphthous Ulcers in Pediatric Dental PatientsThe purpose of this study is to compare the efficacy of laser photobiomodulation and "Magic Mouthwash" for treatment of pain in pediatric patients with aphthous ulcers , to assess how photobiomodulation influences the rate of healing of aphthous ulcers in pediatric patients and to measure changes in pain levels reported by pediatric patients undergoing photobiomodulation treatment for aphthous ulcers.