Understanding Autism That Was Missed Earlier in Life

By Tim Aiello, MA, LPC, NCC, ADHD-CCSP, ASDCS | Clinical Director | Myndset Therapeutics

Over the past few years, a growing number of adults have begun asking a question they never expected to ask about themselves:

“Could I be autistic?”

For decades, autism was primarily associated with children, particularly boys who displayed obvious communication differences or repetitive behaviors. As research has evolved, clinicians have come to understand that autism can present in many different ways, and many individuals reach adulthood without ever receiving a diagnosis.

Today, many adults in their 30s, 40s, and even 50s are discovering autism for the first time. Social media platforms like TikTok and YouTube have helped people recognize patterns in their own lives that were previously misunderstood or dismissed.

If you’ve recently started wondering about autism, you’re not alone. Late diagnosis has become an increasingly common experience as awareness of neurodivergence continues to grow (Lai & Baron-Cohen, 2015).

This article highlights several common patterns reported by adults who later discover they are autistic. It is not intended to diagnose autism, but rather to help individuals better understand experiences that may warrant further exploration.

1. You Always Felt “Different,” But Could Never Explain Why

Many late-diagnosed autistic adults describe a lifelong sense of being different from others.

They may have felt out of sync socially, misunderstood in conversations, or unsure how to navigate social expectations. Often, these differences were attributed to personality, shyness, anxiety, or being “quirky.”

Because autism was historically diagnosed using narrow criteria, many individuals learned to mask their differences rather than recognize them as neurodivergent traits.

2. Social Situations Feel Like Something You Learned, Not Something That Comes Naturally

Many autistic adults describe social interaction as something they studied and practiced rather than something that came intuitively.

They may have learned social rules by observing others, memorizing conversational patterns, or carefully analyzing how people respond in different situations.

This process, often referred to as masking, involves consciously adapting behavior to fit social expectations (Hull et al., 2017).

While masking can help individuals navigate social environments, it can also be mentally exhausting.

3. You Experience Sensory Sensitivities

Sensory differences are a core feature of autism and can include heightened sensitivity to:

• noise• lighting• clothing textures• food textures• crowded environments

Many adults who later discover they are autistic realize that the discomfort they experience in certain environments is related to sensory processing differences rather than anxiety alone.

Research shows that atypical sensory processing is extremely common in autistic individuals (Robertson & Baron-Cohen, 2017).

4. You Become Deeply Absorbed in Interests

Autistic individuals often develop intense and sustained interests in specific topics.

These interests may involve learning everything possible about a subject, spending large amounts of time researching, or feeling energized when engaging with the topic.

In adulthood, these interests can become careers, hobbies, or specialized areas of expertise.

Rather than being unusual, research suggests that focused interests may be a strength associated with autistic cognition (Baron-Cohen et al., 2009).

5. You Feel Socially Drained After Interactions

Many late-diagnosed autistic adults describe feeling extremely fatigued after social interactions.

Even enjoyable social events can require significant cognitive effort, particularly if the individual is masking or monitoring their behavior.

This exhaustion is sometimes referred to as social burnout and may reflect the mental effort required to navigate social environments.

6. You Prefer Predictability and Routine

Many autistic individuals feel more comfortable when their environment is predictable.

Unexpected changes in plans, unclear expectations, or sudden disruptions can create significant stress.

Routine helps provide structure and reduces the cognitive load associated with constantly adapting to new situations.

7. You Struggle With Small Talk but Thrive in Deep Conversations

Late-diagnosed autistic adults often report difficulty engaging in small talk.

However, when conversations shift toward meaningful topics, intellectual discussions, or shared interests, communication may feel much more natural.

This difference often leads to the mistaken belief that someone is socially uninterested when they may simply prefer deeper forms of interaction.

8. You Have Experienced Burnout That Others Don’t Seem to Understand

Many autistic adults experience periods of intense exhaustion and emotional shutdown, often referred to as autistic burnout.

This type of burnout can occur after prolonged periods of masking, sensory overload, or chronic stress.

Research suggests that autistic burnout is a distinct experience involving fatigue, reduced functioning, and increased sensory sensitivity (Raymaker et al., 2020).

9. You Analyze Social Interactions Long After They Happen

Many autistic individuals replay conversations repeatedly in their minds.

They may analyze tone, word choice, facial expressions, and possible interpretations of what was said.

While many people reflect on conversations occasionally, autistic individuals may experience this process more intensely and more frequently.

10. Learning About Autism Feels Uncomfortably Accurate

One of the most common experiences reported by late-diagnosed autistic adults is the moment when learning about autism suddenly explains many aspects of their life.

What once seemed like unrelated traits, sensory sensitivities, social exhaustion, intense interests, and difficulty navigating social expectations, may begin to form a coherent picture.

For many individuals, this realization can bring both relief and grief as they reconsider past experiences through a new lens.

When to Consider an Autism Assessment

If these patterns strongly resonate with your experiences, speaking with a clinician experienced in adult autism assessment may provide helpful clarity.

Autism is not defined by a single trait but by a constellation of characteristics that affect how individuals perceive, process, and interact with the world. A comprehensive assessment looks at developmental history, behavioral patterns, sensory experiences, and how these traits have shown up across different stages of life.

Understanding one’s neurodivergent identity can often lead to greater self-compassion, improved self-advocacy, and more supportive environments.

If you are located in Michigan or Ohio and are exploring the possibility of autism in adulthood, I offer adult Autism Spectrum assessments through Myndset Therapeutics. These assessments are designed to provide a thoughtful, neurodivergent-affirming evaluation process that helps individuals better understand their cognitive and sensory experiences.

You can learn more about assessment services at Myndset Therapeutics or reach out if you are interested in scheduling a consultation.

References

Baron-Cohen, S., Ashwin, E., Ashwin, C., Tavassoli, T., & Chakrabarti, B. (2009). Talent in autism: Hyper-systemizing, hyper-attention to detail and sensory hypersensitivity. Philosophical Transactions of the Royal Society B.

Hull, L., Petrides, K. V., Allison, C., et al. (2017). “Putting on my best normal”: Social camouflaging in adults with autism spectrum conditions. Journal of Autism and Developmental Disorders.

Lai, M.-C., & Baron-Cohen, S. (2015). Identifying the lost generation of adults with autism spectrum conditions. The Lancet Psychiatry.

Raymaker, D. M., Teo, A. R., Steckler, N., et al. (2020). Having all of your internal resources exhausted beyond measure and being left with no clean-up crew: Defining autistic burnout. Autism in Adulthood.

Robertson, C. E., & Baron-Cohen, S. (2017). Sensory perception in autism. Nature Reviews Neuroscience.