Between 44 to 83 percent of children with autism spectrum disorder also experience sleep issues. Most commonly, children with autism have difficulty falling asleep and experience disturbed sleep once they do. Problematically, their sleep problems tend to exacerbate other issues characteristic of the disorder. For instance, daytime sleepiness from lack of sleep often results in hyperactivity, inattentiveness, and aggression during the day. While sleep issues can be pervasive in children, help and resources are available.