Autism: Causes, Symptoms, Diagnosis & Treatment

Autism: Causes, Symptoms, Diagnosis & Treatment

what is autism

Autism is one of the most widely researched developmental conditions, yet it is also one of the most misunderstood. Whether you’re a parent seeking answers, an adult wondering about your own symptoms, or someone supporting a loved one, having accurate and clear information matters. This comprehensive guide simplifies autism in a way that is medically accurate, easy to understand, and deeply supportive.

What Is Autism Spectrum Disorder

Autism Spectrum Disorder (ASD) is a neurological and developmental condition that affects communication, social interaction, sensory processing, and behavior. It’s described as a “spectrum” because symptoms range from mild to more complex.

Most signs of autism appear in the first two years of life, but many individuals especially adolescents and adults may not receive a diagnosis until much later.

If you’re exploring autism because of your child’s behavior, you may also find our guide on Child Therapy in Chicago helpful.

Is Autism a Developmental Disability?

Yes. Autism is considered a developmental disability because it impacts learning, communication, and social or behavioral development. But disability does not mean inability. Many autistic individuals live meaningful, fulfilling, independent lives.

Developmental disabilities vary widely, and autism is one part of a broader category. Learn more in our related article on Developmental Disorders Counseling in Joliet.


What Causes Autism?

There is no single cause of autism. Experts agree that autism develops from a combination of:

Genetic influences

Certain genes increase the likelihood of autism, although no single “autism gene” exists.

Differences in brain development

Research shows variations in how the brain communicates, organizes information, and processes sensory input.

Environmental factors

These do not cause autism alone, but may contribute:

  • Parental age
  • Pregnancy complications
  • Low birth weight
  • Exposure to toxins

For more insights on co-occurring mental health conditions, see our page on Anxiety Therapy in Joliet.

Types of Autism Spectrum Disorder

Autism used to be divided into different diagnoses. Today, all fall under ASD, but differences still help describe needs and presentation:

1. Level 1 Autism (Requiring Support)

Often associated with:

  • Mild social challenges
  • Sensory sensitivity
  • Routines & special interests

2. Level 2 Autism (Requiring Substantial Support)

Includes:

  • More noticeable communication difficulties
  • Behavioral rigidity
  • More significant support needs

3. Level 3 Autism (Requiring Very Substantial Support)

Characterized by:

  • Limited communication
  • High sensory reactivity
  • Intense need for support in daily functioning

4. Autism in Girls

Girls are often missed due to:

  • Masking behaviors
  • Internalizing symptoms
  • Social imitation skills

You can learn more about unique presentations in our article on Behavioral Issues Therapy in Joliet.

Behavioral Characteristics of Autism

Every autistic person is different, but common characteristics include:

Social & Communication Differences

  • Difficulty with back-and-forth conversation
  • Limited eye contact
  • Challenges reading facial expressions or tone
  • Preference for routine or predictability

Sensory Processing Differences

  • Sensitivity to lights, sounds, textures, or crowds
  • Seeking sensory input (rocking, tapping, spinning objects)

Behavioral or Emotional Regulation

  • Repetitive movements (stimming)
  • Difficulty with changes in routine
  • Strong, focused interests

For families navigating behavioral concerns, explore our guide on Family Therapy in Joliet.

Autism Symptoms in Children vs. Adults

Autism looks different across ages. Many adults go undiagnosed due to masking, high intelligence, or learned coping behaviors.

Autism Symptoms in Children

  • Delayed speech
  • Limited eye contact
  • Highly focused interests (e.g., numbers, letters)
  • Repetitive behaviors
  • Difficulty engaging in pretend play
  • Intense reactions to sensory input

If you’re noticing these early signs, our resource on Child Therapy in Joliet may be helpful.

Autism Symptoms in Adults

Adults may experience:

  • Social exhaustion
  • Difficulty understanding social cues
  • Sensory overwhelm in workplaces
  • Deep focus on hobbies or interests
  • Preference for routines
  • Trouble with small talk
  • Masking (hiding traits to fit in)

To explore adult-related support, see Online Therapy in Chicago.

How Is Autism Diagnosed?

Diagnosis is typically provided by:

  • Psychologists
  • Developmental pediatricians
  • Neurologists
  • Licensed clinical specialists

Assessment Includes:

  • Behavioral observations
  • Developmental history
  • Standardized testing (ADOS-2, ADI-R)
  • Communication evaluation
  • Sensory profile assessment

Early diagnosis can make a life-changing difference. If you’re unsure where to start, read our guide on Coping Skills to Build Resilience as you begin the journey.

Treatment Options for Autism

Autism isn’t “cured”—it is supported.

Common therapies include:

1. Behavioral Therapies

  • Applied Behavior Analysis (ABA)
  • Positive reinforcement models
  • Skill-building programs

2. Speech & Language Therapy

Improves communication, social understanding, and alternative communication tools.

3. Occupational Therapy

Helps with sensory processing, motor skills, and daily functioning.

4. Social Skills Training

Builds confidence and peer interaction.

5. Mental Health Counseling

Addresses anxiety, depression, emotional regulation, and identity-related concerns.
Learn more in our guide on Anxiety Counseling, often helpful for autistic clients.

6. Medication

Not for autism itself, but for co-occurring conditions like ADHD, anxiety, OCD, or irritability.


Living With Autism: Can Autistic People Live a Normal Life?

Absolutely. Many autistic individuals live full, happy, independent lives. Success depends on:

  • Early support
  • Environmental understanding
  • Access to therapies
  • Emotional and social support
  • Acceptance at home, school, and work

If you’re parenting an autistic child, our page on Strengthening Bonds Through Family Counseling can help your family navigate challenges together.

Autism Support for Families in Chicago

Chicago has a strong network of autism services, including:

  • Developmental clinics
  • School-based support
  • Autism-friendly community programs
  • Social skills groups
  • Sensory-friendly spaces

PS IT’s Counseling is an important part of that support system—offering neuroaffirming care for individuals and families.

Autism Therapy at PS IT’s Counseling

At PS IT’s Counseling, we provide compassionate, neuroaffirming care for autistic children, teens, and adults.
 

Our therapists help individuals with:

✔ Social communication
✔ Emotional regulation
✔ Anxiety & overwhelm
✔ Transitions & life changes
✔ Sensory needs
✔ Self-advocacy & identity

Families also receive guidance on:

  • Parent support
  • Behavior understanding
  • Communication techniques
  • Integrating routines at home

If you’re looking for personalized support, visit our main page on Counseling in Chicago to get started.

FAQ

How do I know if I’m autistic?

The only way to know for sure is through a professional assessment, but signs include sensory sensitivities, social exhaustion, difficulty reading cues, and intense interests.

What are the 5 main symptoms of autism?

  1. Communication differences
  2. Social interaction differences
  3. Sensory processing differences
  4. Repetitive behaviors (stimming)
  5. Need for routine

Can autistic individuals live a normal life?

Yes. Many autistic people pursue careers, relationships, education, and independence with the right support.

What are the behaviors of autism in adults?

Adults often show masking, sensory overload, social fatigue, communication challenges, or rigid routines.

Find Autism Support in Chicago

Whether you’re a parent seeking guidance or an adult exploring your identity, support is available. At PS IT’s Counseling, you’re not navigating this alone. Our neuroaffirming specialists are here to help you understand, grow, and thrive at any age.

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