Autism (ASD)

Autism spectrum disorder is a neurodevelopmental condition, meaning it relates to how the brain develops. Autistic people may communicate, socialize, learn and perceive sensory input differently from non-autistic people.

Autism is present from early childhood, though it may not be recognized until later, particularly in people whose traits are subtle or who learn to mask them. Many adults, especially women, are identified later in life.

The term "spectrum" reflects the wide range of experiences. Some autistic people speak fluently and live independently; others communicate without speech and need significant daily support. Clinicians sometimes describe support needs in levels, with level 1 autism indicating fewer support needs and higher levels indicating more.

Asperger's was a separate diagnosis in the past for people without language or intellectual delays. It's now included within autism spectrum disorder, though some people still identify with the term. In the UK and elsewhere, "autism spectrum condition" is also used.

Many autistic people view autism as part of their identity rather than a disorder.

Signs of autism fall into two main areas, and each person has a unique combination.

Social communication and interaction
- Differences in eye contact, facial expressions or gestures
- Finding unwritten social rules confusing
- Difficulty with back-and-forth conversation or small talk
- Preferring to play or spend time alone, or relating to others in different ways
- Taking language literally

Restricted and repetitive patterns
- Repetitive movements, such as hand-flapping or rocking (often called stimming)
- Strong preference for routine and distress at unexpected changes
- Intense, focused interests
- Sensory differences: being over- or under-sensitive to sound, light, touch, taste or smell

Autism in toddlers may show as not responding to their name, limited pointing or showing, delayed speech, loss of previously learned words, lining up toys or unusual reactions to sounds and textures.

In older children and adults, signs can be less obvious, especially with masking. Social exhaustion, anxiety and burnout may be the first signs noticed.

Autism has a strong genetic component. It often runs in families, and research has identified many genes associated with autism, each contributing a small effect. In some cases, autism is linked with specific genetic conditions.

Certain prenatal and early developmental factors, such as being born very prematurely or having older parents, are associated with a slightly higher likelihood, but they don't cause autism on their own.

Extensive research has found no link between vaccines and autism. Parenting style does not cause autism either.

Autism commonly co-occurs with other conditions, including ADHD, anxiety, depression, sleep difficulties, epilepsy, gastrointestinal issues and learning disabilities. Autistic children may experience heightened anxiety, including separation anxiety.

Understanding that autism is a neurological difference helps shift the focus from blame to understanding and support. Many families find relief in a diagnosis because it explains their child's experiences and opens access to the right help.

There's no medical test, like a blood test, for autism. An autism diagnosis is made through a comprehensive assessment by trained professionals. Online autism tests and questionnaires can be a starting point for reflection but can't confirm or rule out autism.

For children, the process often starts when parents, teachers or a pediatrician notice developmental differences. Screening may take place during routine checkups. A full assessment may involve a pediatrician, child psychiatrist, neuropsychologist, speech therapist or educational psychologist. It usually includes:

• Developmental history from parents
• Observation of play, communication and behavior
• Standardized assessment tools
• Hearing and other checks to rule out other explanations

For adults, assessment involves a detailed interview about childhood and current experiences, often with input from a family member if possible.

Wait times for assessment can be long in many places. While waiting, families and adults can still access support for specific needs, such as speech therapy, sensory strategies or help with anxiety.

Support for autism focuses on helping autistic people communicate, learn, manage challenges and live fulfilling lives on their own terms. Approaches vary by age and needs:

• Speech and language therapy for communication, including alternative communication tools for people who don't speak
• Occupational therapy for sensory needs, motor skills and daily living
• Educational support, including individualized learning plans and classroom adjustments
• Parent-mediated programs that help caregivers support communication and development
• Social communication support that respects autistic ways of interacting
• Psychological therapy, such as cognitive behavioral therapy adapted for autistic people, for anxiety or depression

Medication isn't used to treat autism itself, but a psychiatrist may treat co-occurring conditions such as ADHD, anxiety or sleep problems.

Many autistic adults find that understanding their neurotype, connecting with autistic communities and making environmental changes, such as reducing sensory overload, improve wellbeing more than trying to appear non-autistic.

Good support respects the person's preferences and strengths.

Consider seeking an assessment if a child isn't meeting communication milestones, loses previously acquired skills, or shows several signs of autism. Early support can make a meaningful difference, so it's best to talk to a pediatrician or primary care doctor as soon as you have concerns. Loss of language or social skills at any age should be checked promptly.

Adults may seek assessment if they've always felt different, struggle with social exhaustion or sensory overload, or recognize themselves in descriptions of autism. A diagnosis can provide self-understanding and access to support.

Professionals involved include neuropsychologists, psychiatrists, clinical psychologists, speech therapists and educational psychologists. In a first appointment, expect questions about development, communication, social experiences, routines, interests and sensory differences.

Autistic people have higher rates of anxiety and depression. If you or an autistic person you care about is in crisis or having thoughts of suicide, call 911 or your local emergency number, or call or text 988 in the US (Samaritans 116 123 in the UK and Ireland).