Can head trauma cause you to get autism spectrum disorder?

Not really: Head trauma can create injury severe enough to cause behaviors that may seem similar to those with autism. It does not cause autism itself. Autism has brain inflammation as a component and digestive issues. Mild head trauma will not lead to autism. Repeated head injures can lead to Parkinson's and dementia later...Not autism.

Not likely: While there are case reports of major personality changes occuring with some children after severe head injuries, this would be considered a rare occurance. And then probably not technically autism, since you usually will have to show signs of autism as a child to fulfil the true criteria of autism.