As I had mentioned in my last post, the act of stimming (self-stimulation) involves doing repetitive things which can ease overwhelming emotions, such as anxiety or even excitement. Some of these behaviors that commonly seen among non-autistics includes nail-biting, leg bouncing, finger tapping, and hair twirling. In autistics, stimming may look different, or even “weird” or “strange” to someone neurotypical, and can often be more intense or recurring. Sometimes, stimming is also used to calm sensory stressors, such as loud noises or bright lights, or perhaps can help stimulate an autistic who is usually hyposensitive to their surroundings.
For example, I can sometimes become either overwhelmed or underwhelmed with what is going on around me, and in both cases, I tend to bounce both of my legs rapidly, typically with my right leg going twice the speed as the left. The more overwhelmed I feel, the faster I have to bounce them, and sometimes it turns into actual shaking instead of bouncing. When I am alone, I will do other, less socially acceptable things, such as rock myself back and forth or flap my hands to relieve tension.
Other autistic people may do things such as spinning, repeating certain words or phrases, clapping their hands, or even staring at something. And just like neurotypical people, autistic people can also stim out of habit.
Sometimes autistic stimming tends to be more extreme, and the chances of these behaviors entering problematic territory increases. If an autistic person cannot stop themselves from stimming, they may be unable to complete schoolwork or interact with others. Stimming can also become physically dangerous, such as when hitting, scratching, head-banging, or biting is involved, since this could result in injury to the individual, or even somebody near them. In these cases, some sort of behavioral therapy may be needed, which can help the individual learn how to develop more safe forms of self-stimulation.
With this in mind, you would probably not be surprised to hear that self-harm in general is more common among autistic people. Even if it is not their usual method of stimming, autistics, being more likely to experience sensory overload or overwhelming emotions, can find relief in self harm. Just like neurotypicals, autistic people report self-harming for several common reasons, such as relieving tension, punishing themself, distracting from distressing thoughts, or feeling a sense of control. In some cases, autistic people (usually children) may self-harm in attempt to communicate their feelings/needs, especially since they may not be able to communicate as easily with their caretakers or anybody else around them.
In order to help decrease the rate of self-harm among autistic people, we must make their stimming techniques as socially acceptable as neurotypical stimming techniques. This could be by encouraging public stimming (when safe) or teaching people that these types of stimming are normal, and that staring can make the person even more stressed. After all, why should something like bouncing your legs be acceptable, but not rocking back and forth or flapping your arms?