. “There are many potential causes of pediatric sleep disorders and TMD. Some of the most common causes include: • Allergies • Asthma • Enlarged tonsils and adenoids • ADHD • Autism • Cerebral palsy • Down syndrome • Gastroesophageal reflux disease (GERD) • Obstructive sleep apnea (OSA) • Stress • Anxiety • Depression • Jaw injury • Teeth grinding (bruxism).