Autism Causes:

social interaction, communication skills, and cognitive function. Individuals with autism typically have difficulties in communication and language, social interactions, and leisure or play activities. They often also have numerous physical ailments which may include allergies, asthma, epilepsy, digestive disorders, persistent viral infections, feeding disorders, sensory integration disorder, sleeping disorders, and more.
Causes of autism:
In most cases the cause of autism with the nervous system is unknown. Research findings indicate strong genetic components that are mostly like, environmental, immunologic, and metabolic factors also influence the development of the disorder. Some causes are as follows:
There is probably no single gene or genetic defect that is responsible for autism and Researchers suspect that there are a number of different genes that, when combined together, increase the risk of getting autism. In families with one child with autism, the risk of having another child with autism is 3-8% due to genetic problems. The concordance of autism in monozygotic twins is 30% and even number of studies have found that first-degree relatives of children with autism also have an increased risk of autism spectrum disorders.
In some children, autism is linked to an underlying medical condition for examples include metabolic disorders, congenital infections like rubella, genetic disorders like tuberous sclerosis, developmental brain abnormalities, and neurologic disorders acquired after birth. But note that these medical disorders alone do not cause autism as most children with these conditions do not have autism.
There is a high risk in some families for the cause of autism due to environmental factors and exposures that may also interact with genetic factors. Over time, many different theories have been proposed about what causes autism. Some of these theories are no longer accepted, however.
Emotional trauma: Some theories like emotional trauma at an early age are believed to be especially bad parenting and it was blamed but now this theory has been rejected.
Vaccines: Although the mercury preservative used in some vaccines is known to be neurotoxic people believed there is some link with vaccines and autism. But the most recent research on this subject does not suggest any specific link between vaccines and autism.
These were some symptoms related to autism.

Autism symptoms checklist
What is autism? Autism is a disease that affects the neurological development of the human body. It is four times more likely to occur in boys as compared to girls and is generally detected by the age of three. It results in communication...

Characteristics of autism
What is autism? Autism is a disease that affects the neurological development of the human body. The disease involves abnormalities in the brain which apparently controls the nervous system. Autistic people respond aggressively to sensory...

History Of Autism
In 1908, Eugen Bleuler coined the word "autism" in schizophrenic patients who screened themselves off and were self-centered. In 1943, the American child psychiatrist Leo Kanner described 11 children with the following common traits: impairments...

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