Controversial theories attribute the increase in autism to some unknown environmental factor or chemical trigger. That study has since been discredited by most experts. Many studies have indicated that genetics plays at least some role in autism, Wiznitzer says. If one identical twin has autism, the other will have at least some degree of the disorder about 90 percent of the time. No cure, just hope No proven cure for autism exists, but treatment theories abound.
Some parents try modifying a child's diet or adding special supplements.
In addition to behavioral problems, many autistic children have severe allergies and an intolerance for certain foods. Many parents also try sensory integration, a therapy designed to help the brain better process information from the body. For example, a therapist might recommend parents routinely brush a child's body to get him used to touch. A number of educational theories exist as well. Others encourage therapists and parents to build social and emotional connections with the autistic child by allowing him to lead playing and learning.