 [ Symptoms ] can a head injury cause autism  baby of 1 year hit head hard on front of head like i have never heard after raising 3 children no outwards signs a of cut or bruising child now 9 just diagnosed with autism could this injury have anything to do with it [ Disease ] there are no studies that show a relationship from a childhood head injury to true autism but that is something that a neurologist should answer since there are many different types of autism and not all head injuries are innocent