We can't heal this genetic neuropsychiatric disorder, but as the autistic cases are increased through out the world, we can reduce it by early diagnosis and treatment as well.
Currently a study was done with 108 children with ASD symptoms along with cerebral perfusion [hbot-therapy.com/hbot-can-t...]
It has been proven after fifty HBOT (Hyperbaric Oxygen Therapy) sessions that, not only cerebral perfusion but the behavioural abnormalities due to autism / ASD were also improved.
So, HBOT can help to treat autism along with other interventions as per this study.