Introduction
One of the most visible and yet often misunderstood aspects of autism is stimming. Many autistic adults describe stimming as an important part of how they regulate emotions, manage sensory experiences, communicate feelings, and navigate an often overwhelming world.
Despite this, stimming is frequently hidden, suppressed, or discouraged because of social expectations and stigma.
Historically, repetitive movements were viewed primarily as problematic behaviours that needed to be reduced. However, modern research increasingly suggests that stimming often serves important and adaptive functions. Autistic adults themselves consistently report that stimming helps them cope, self-regulate, and express themselves.
What Is Stimming?
The word stimming is short for self-stimulatory behaviour.
In clinical language, stimming falls under what are often called restricted and repetitive behaviours (RRBs). These include repetitive movements, sounds, actions, or interactions with objects. The DSM-5 includes:
“Stereotyped or repetitive motor movements, use of objects, or speech”as one of the diagnostic features of Autism Spectrum Disorder.
Many autistic people prefer the term stimming because it is seen as less pathologising and better reflects their lived experience.
Examples of Stimming in Adults
Contrary to common stereotypes, stimming does not disappear with age.
Autistic adults may engage in:
Motor Stimming:
- Hand flapping.
- Finger flicking.
- Rocking.
- Pacing.
- Leg bouncing.
- Spinning.
- Repetitive movements of the hands or body.
Vocal Stimming:
- Humming.
- Repeating words or phrases.
- Clicking sounds.
- Whistling.
- Repetitive vocalisations.
Sensory Stimming:
- Touching particular textures.
- Watching moving objects.
- Playing with jewellery.
- Using fidget objects.
- Seeking visual or auditory sensory experiences.
Importantly, many stimming behaviours are subtle and may not be obvious to other people.
Why Do Autistic Adults Stim?
One of the most significant themes emerging from research is that stimming serves multiple important functions.
Emotional Regulation:
Many autistic adults use stimming to regulate strong emotions.
Stimming may occur during:
- Excitement.
- Anxiety.
- Anticipation.
- Frustration.
- Happiness.
Autistic participants frequently describe stimming as helping them manage emotional intensity and restore a sense of balance.
Managing Sensory Experiences:
Sensory processing differences are common in autism.
Research has found strong links between sensory sensitivity and repetitive behaviours. Many autistic adults report that stimming helps them manage sensory overload and cope with overwhelming environments.
This may involve:
- Blocking overwhelming sensory information.
- Creating predictable sensory input.
- Regulating arousal levels.
- Providing comfort when overstimulated.
Supporting Concentration:
Some autistic adults describe stimming as helping them focus attention, particularly during cognitively demanding tasks.
Rather than distracting them, certain repetitive movements or sensory activities may actually improve concentration and information processing.
Communication and Expression:
Research also suggests that stimming can have a communicative function.
Some autistic adults report that stimming helps express feelings that are difficult to put into words, while others describe recognising emotional states in other autistic people through their stimming.
The Positive Functions of Stimming
For many years, stimming was primarily viewed as a symptom to be eliminated.
However, recent studies have challenged this assumption.
Interviews with autistic adults consistently describe stimming as:
- Calming.
- Soothing.
- Regulating.
- Enjoyable.
- Meaningful.
- Necessary for wellbeing.
Research increasingly suggests that stimming can function as an adaptive coping strategy rather than a maladaptive behaviour.
Why Is Stimming Often Suppressed?
Despite its benefits, many autistic adults report actively suppressing their stims.
The primary reason is not because stimming is unhelpful, but because of other people’s reactions to it.
Social Stigma:
Many stims are viewed as socially unusual.
Autistic adults frequently report receiving messages such as:
- “Stop doing that.”
- “You look strange.”
- “People are staring at you.”
- “Act normally.”
As a result, many learn from an early age that visible stimming is socially discouraged.
Masking and Camouflaging:
Stimming suppression is often part of a broader process known as masking or camouflaging.
Masking involves consciously or unconsciously hiding autistic characteristics in order to fit into social expectations.
This may include:
- Suppressing hand movements.
- Forcing eye contact.
- Monitoring body language.
- Replacing visible stims with less noticeable alternatives.
Research on autistic masking identifies suppression of stimming as one of the common strategies autistic adults use to avoid judgement and social consequences.
What Are the Consequences of Suppressing Stims?
Emerging evidence suggests that suppression is not without cost.
A study examining sensory sensitivity and stimming found that social pressure to suppress stimming had negative effects on emotional wellbeing and cognitive functioning.
Notably:
- 84% of autistic adults surveyed reported being told to stop stimming or repetitive movements.
- 75% reported not always stimming in their preferred way due to concerns about social acceptability.
Many participants reported that suppressing stims increased stress and discomfort.
Research on masking more broadly also suggests that suppression of autistic behaviours can contribute to:
- Emotional exhaustion.
- Increased anxiety.
- Reduced authenticity.
- Psychological distress.
Stimming, Identity and Community
A more recent theme in the literature concerns the social and cultural significance of stimming.
Research suggests that many autistic adults view stimming as part of their autistic identity rather than merely a symptom.
Some participants described stimming as helping them:
- Connect with other autistic people.
- Recognise shared experiences.
- Communicate emotions non-verbally.
- Feel authentic.
Interestingly, one recent study found that autistic adults often regarded stimming positively and reported that negative experiences were usually linked to stigma, judgement, or self-injury rather than the behaviour itself.
When Might Intervention Be Appropriate?
Most stimming is harmless and beneficial.
However, support may be needed when a stim:
- Causes physical injury.
- Places the person at risk.
- Causes significant distress.
- Interferes substantially with daily functioning.
In these situations, the aim is usually to understand the underlying need and support safer alternatives rather than simply eliminating the behaviour.
Conclusion
Stimming and repetitive motor movements are a core aspect of autism and continue throughout adulthood for many autistic people. Although historically viewed as behaviours that should be reduced, contemporary research paints a very different picture. Autistic adults consistently describe stimming as a valuable tool for emotional regulation, sensory management, concentration, communication, and self-expression.
The research also highlights a recurring problem: many autistic adults suppress their stims because of social pressure and stigma. While this may help them avoid judgement, suppression often comes at the cost of increased stress, reduced wellbeing, and a diminished sense of authenticity.
As understanding of autism continues to evolve, there is growing recognition that the goal should not be to eliminate harmless stimming. Instead, professionals, families, employers, and society can support autistic adults by understanding the purpose of stimming, recognising its benefits, and creating environments where autistic people feel safe to regulate and express themselves without fear of judgement.
References
American Psychiatric Association (2022) Diagnostic and Statistical Manual of Mental Disorders: DSM-5-TR. 5th edn., text revision. Washington, DC: American Psychiatric Publishing.
Charlton, R.A., Entecott, T., Belova, E. and Nwaordu, G. (2021) ‘It feels like holding back something you need to say: autistic and non-autistic adults’ accounts of sensory experiences and stimming’, Research in Autism Spectrum Disorders, 89, 101864.
Kapp, S.K., Steward, R., Crane, L., Elliott, D., Elphick, C., Pellicano, E. and Russell, G. (2019) ‘“People should be allowed to do what they like”: autistic adults’ views and experiences of stimming’, Autism, 23(7), pp. 1782–1792.
Miller, D., Rees, J. and Pearson, A. (2021) ‘“Masking is life”: experiences of masking in autistic and nonautistic adults’, Autism in Adulthood, 3(4), pp. 330–338. Available at: https://doi.org/10.1089/aut.2020.0083.
Morris, I.F., Sykes, J.R., Paulus, E.R., Dameh, A., Razzaque, A., Vander Esch, L., Gruenig, J. and Zelazo, P.D. (2025) ‘Beyond self-regulation: autistic experiences and perceptions of stimming’, Neurodiversity, 3, 113.
Nwaordu, G., Charlton, R.A. and colleagues (2021) ‘Suppressing stimming for social acceptance has negative impact’, Research in Autism Spectrum Disorders
