Sleep disruption is a term used to describe a variety of sleep-related issues, such as insomnia, snoring, and apnea. Apnea is a condition in which breathing stops and starts during sleep, resulting in disrupted sleep and fatigue. It is usually caused by an obstruction in the airway, such as enlarged tonsils or obesity. Treatment for apnea includes lifestyle changes, such as weight loss, and medical interventions, such as CPAP machines.