There are stereotypic behaviors including spasmodic upper-body squeeze ("self hug"), hand licking and page flipping ("lick and flip") behavior, mouthing objects, insertion
[rxlist.com]
[…] disorders sometimes with hyperactivity, frequent temper tantrums, impulsivity, distractibility, disobedience, aggression, self injury, toileting difficulties, and self-injurious behaviors
[rxlist.com]