PTSD in autistic adults often looks like heightened autistic traits, including severe sensory overload, shutdowns, meltdowns, increased repetitive behaviors, social withdrawal, and difficulty verbalizing distress, alongside classic PTSD symptoms like flashbacks and hyperarousal, making diagnosis tricky as trauma symptoms are often mistaken for autism itself. Watch for increased irritability, avoidance, sleep problems, self-injury, and regression in communication skills, especially after a traumatic event, notes the {National Autistic Society and {Attwood & Garnett Events https://www.attwoodandgarnettevents.com/blogs/news/understanding-the-trauma-experiences-of-autistic-individuals}}.
For example, decreased attachment, flattened affect, repetitive play or speech, and withdrawal are all symptoms of PTSD and common social behaviors among autistic children and adults.
High-functioning PTSD looks like someone who meets their daily responsibilities while battling symptoms that others don't see. They may excel at work, maintain relationships, and appear successful, but internally they're managing distressing memories and avoiding reminders of traumatic events.
People with PTSD can have intense reactions to certain places, people, smells and sounds — called triggers. Triggers may cause it to feel like the traumatic event is happening again, which can be disorienting and scary.
Symptoms of PTSD include re-experiencing the traumatic event, avoiding triggers related to the event, negative changes in mood and thinking, and hyperarousal and reactivity (DSM-5, APA, 2013). Research indicates that autistic people are more likely to report symptoms of PTSD.
The capabilities of interneurons to respond to stress is altered in ASD. This alteration worsens autism traits following the formation of a traumatic memory.
Around 90% of autism cases are attributed to genetic factors, meaning autism is highly heritable, with many different genes contributing, rather than a single cause, often interacting with environmental influences during early brain development, though specific environmental factors don't cause it but can increase risk. Twin studies show strong genetic links, with concordance rates between 60-90% in identical twins, and research points to complex interactions of many genes and prenatal/perinatal factors.
When our brain then recognises similarities between our present situation and our past trauma (e.g. a colour, smell or noise), it can activate the fight, flight, freeze, flop or friend response, even if we're not currently in danger.
The 5 core signs of PTSD fall into categories: Re-experiencing (flashbacks, nightmares), Avoidance (staying away from reminders), Negative Changes in Mood & Cognition (guilt, detachment, loss of interest), Changes in Arousal & Reactivity (hypervigilance, easily startled, irritability), and sometimes Physical Symptoms like chronic pain or headaches, all stemming from a trauma, though the exact symptoms vary.
The prefrontal cortex regulates emotions and decision-making but can be impaired in PTSD, making it harder to control fear. The hippocampus manages memory and helps distinguish past experiences from the present; changes here can cause flashbacks and intrusive thoughts.
PTSD can be misdiagnosed as the symptoms or behaviors of other mental health conditions. Conditions such as anxiety, depression, acute stress disorder, and more, have similarities to PTSD. It is important to note that not everyone who experiences a traumatic event has PTSD.
Signs of hidden anxiety often look nothing like what you'd expect. Instead of panic attacks or visible distress, it can show up as overthinking, overworking, and overachieving, behaviors that are often praised rather than questioned.
The thousand-yard stare (also referred to as two-thousand-yard stare) is the blank, unfocused gaze of people experiencing dissociation due to acute stress or traumatic events.
Common symptoms of PTSD
"Looping" in autism refers to getting "stuck" in repetitive mental cycles, replaying thoughts, questions, worries, or phrases endlessly, often triggered by stress, sensory overload, or uncertainty, and linked to challenges with executive function and attention. It's a non-clinical term for perseveration or rumination, where an autistic individual's brain struggles to shift focus from an internal loop, which can be mentally exhausting but sometimes also comforting.
The "6-second rule" for autism is a communication strategy where a speaker pauses for about six seconds after asking a question or giving information, giving the autistic person extra time to process it without feeling rushed, which helps reduce anxiety and allows for a more thoughtful response, reducing frustration for both parties. Instead of repeating or rephrasing, which can be confusing, you wait, and if needed, repeat the exact same words after the pause.
Aggressive behaviors also include complaining, "backstabbing," being late or doing a poor job on purpose, self-blame, or even self-injury. Many people with PTSD only use aggressive responses to threat. They are not able to use other responses that could be more positive.
Criteria for Diagnosis
To receive a diagnosis of PTSD, a person must have at least one re-experiencing symptom, at least three avoidance symptoms, at least two negative alterations in mood and cognition, and at least two hyperarousal symptoms for a minimum of one month.
Symptoms may include flashbacks, nightmares, severe anxiety and uncontrollable thoughts about the event. Most people who go through traumatic events may have a hard time adjusting and coping for a short time. But with time and by taking good care of themselves, they usually get better.
Identifying Your Personal PTSD Triggers
A bottom-up therapeutic approach helps survivors acquire new coping skills to manage overwhelming emotions effectively. Without learning to safely experience and process feelings in the body, trauma cannot be fully addressed.
10 Things Not To Say To Someone With CPTSD
Additionally, inherited genetic variations contribute greatly. Research shows that both mothers and fathers can carry autism-related gene variants. Some of these are common variants that increase the risk of autism, while others are rare mutations causing more severe effects.
Donald Triplett, autism's 'Case 1,' dies at 89. Triplett gained media attention for his autism later in life, and he became the face of the effort to research the lives of older adults with autism.
Understanding the 6 stages of an autism meltdown can help parents, caregivers, and educators respond with empathy and support.