Autism Spectrum Disorder: Causes, Symptoms, and Treatment
Medically reviewed by Sumiran Racherla, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Autism Spectrum Disorder?
A developmental pediatrician (a children's doctor trained in development) or a child psychiatrist often leads care for autism spectrum disorder. Care teams may also include psychologists and speech therapists. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is autism spectrum disorder?
Autism spectrum disorder (ASD) is a neurological and developmental disorder. It begins early in childhood and lasts throughout a person's life. It affects how a person acts and interacts with others, communicates, and learns.
It is called a "spectrum" disorder because people with ASD can have a range of symptoms. Some people with ASD might have problems talking with others. They might not look you in the eye. They may also have restricted interests and repetitive behaviors. Some may spend a lot of time putting things in order.
Symptoms
Signs often start early in childhood. Some can be noticed before age 2. Common signs include:
- Not keeping eye contact, or not responding to their name by 9 months of age.
- Using few or no gestures, such as not waving goodbye, by 12 months.
- Repeating words or phrases over and over. Doctors call this echolalia.
- Getting upset by minor changes and needing to follow certain routines.
- Flapping hands, rocking the body, or spinning in circles.
- Unusual reactions to the way things sound, smell, taste, look, or feel.
Most people with ASD also have other related characteristics. These can include delayed language skills, delayed movement or learning skills, and unusual sleeping or eating habits. Some have epilepsy (a seizure disorder), anxiety, or stomach problems such as constipation.
Causes and who gets it
The causes of ASD are not known. Research suggests that both genes and environment play important roles. Changes in over 1,000 genes have been reported in connection with ASD. Genetic factors are estimated to contribute 40 to 80 percent of the risk.
Environmental risk factors may also add to the risk. One example is parental age. ASD is common, and the number of children diagnosed has been increasing rapidly in the past few decades. It is more than four times as common in boys as in girls.
How doctors diagnose it
At well-child checkups, the health care provider should check your child's development. If there are signs of ASD, the child will have a comprehensive evaluation.
This evaluation may include a team of specialists doing various tests. Signs can sometimes be found before age 2. Most children are diagnosed between ages 2 and 4. This is when communication and social skills, such as playing with others, usually begin to develop.
Treatment
There is currently no one standard treatment for ASD. There are many ways to help a child grow and learn new skills. Starting early can lead to better results. Treatments include behavior and communication therapies, skills training, and medicines to control symptoms.
Medicines do not treat autism itself. They may help with symptoms that come with it, such as anxiety or sleep problems. The right treatments and supports can help a child build skills and improve daily life.
When to see a doctor
Talk to your child's doctor if your child is not meeting milestones for their age. Tell the doctor if your child does not respond to their name by 9 months or does not point to show you something by 18 months. Early evaluation matters. Ask about screening right away if you have concerns.
If you are thinking about harming yourself, call or text 988 (the Suicide and Crisis Lifeline) right away. People with ASD have higher rates of anxiety and depression, so mood changes deserve prompt care.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either can track your child's development at checkups and refer you to a developmental pediatrician early. They can also coordinate the therapies and school supports your child needs over time.
Common questions
Can autism be cured?
No. ASD is a lifelong condition. There is no cure. But treatments and supports can help a person build skills and improve daily life.
Is autism caused by parenting style?
No. The causes of ASD are not known, but research suggests that both genes and environment play important roles.
At what age is autism usually diagnosed?
Signs can sometimes be found before age 2. Most children are diagnosed between ages 2 and 4, when social and communication skills usually begin to develop.
How common is autism?
ASD is common, and the number of children diagnosed has been increasing rapidly in the past few decades. It is more than four times as common in boys as in girls.
Sources
- MedlinePlus - Autism Spectrum Disorder
- MedlinePlus Genetics - Autism spectrum disorder
- Centers for Disease Control and Prevention - Signs and Symptoms of Autism Spectrum Disorder
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
