What Makes Severe Autism So Challenging?

Severe Autism Isn't an Official Diagnosis, But Has It's Unique Challenges

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There is no such diagnosis as "severe autism." When the term is used, therefore, it's really just a way of describing a person's level of functioning and need. Severe autism is sometimes called low-functioning autism, classic autism, "Kanner's" autism, or profound autism. Simply put, it describes those autistic people with the most significant symptoms.

Severe or "Level 3" Autism

Another way to describe severe autism is to talk about the level of support required for a person with the diagnosis to function safely.

  The current diagnostic manual (DSM-5) provides three levels of autism, with more support required at each level. People with severe autism would usually be diagnosed as having "Level 3" Autism Spectrum Disorder, meaning they need a great deal of support. It is not unusual for a person with severe autism to require 24/7 support.

What Makes Severe Autism Different?

What makes severe, or level 3, autism different? There are really two categories of differences. The first is the severity of symptoms: people with severe autism have many of the same issues as anyone else on the spectrum, but more so. The second category includes symptoms that are relatively rare in higher functioning autism, but which are common among people who are more severely affected.

More Severe Versions of Symptoms Shared by Most Autistic People

It's important to note that no two people with autism share precisely the same symptoms.

Thus one person might have severe speech delays but mild sensory dysfunction and no problems with sleeplessness or mood. Another might have severe anxiety but no cognitive challenges.

  1. Speech and Language Challenges:  While everyone with an autism spectrum disorder has a difficult time with social skills and communication, people with severe autism are most likely to be entirely unable to use spoken language. They may also appear to take no notice of the people around them.
  1. Sensory Dysfunction. Many people on the autism spectrum have sensory dysfunction (they're too sensitive or not sensitive enough to light, sound, touch, taste or smell). People with severe autism tend to be extremely sensitive, such that going out into crowds, bright lights or loud noises can be overwhelming.
  2. Cognitive Challenges: Many people with autism have high IQ's. Some have IQ's at or near 75 -- the cut off for what used to be called mental retardation. Generally speaking, however, people with severe autism have low to very low IQ's, even when tested using non-verbal testing tools. It's important to know, however, that appearances can be deceiving: some people with severe autism have learned to communicate using sign, spelling boards or other tools. Some of those people are quite articulate, and they make it clear that at least some people with severe autism are more capable than they appear to be.
  3. Repetitive Behaviors. Most people on the autism spectrum have repetitive behaviors and self-stimulatory behaviors. Higher functioning individuals may flap their hands, rock, or flick their fingers. Often, they can control these behaviors for a period of time when necessary. People with severe autism are likely to have many such behaviors, and those behaviors can be extreme (violent rocking, door slamming, moaning, etc.)
  1. Physical and Emotional Symptoms. People with severe autism may also have physical symptoms that sometimes appear with less profound autism. These may include sleeplessness, epilepsy, mood disorders, and, according to some sources, gastrointestinal issues. Because of their difficulties with communication, such issues can go undetected or undiagnosed.

Symptoms Most Common with Severe Autism

  1. Self-Injury. While self-injury can occur among people with milder forms of autism, behaviors such as head-banging and pica (eating non-food items) are far more common among people with severe autism.
  2. Aggressive and Anti-Social Behaviors. Aggression is relatively rare in autism, but it is certainly not unheard of, particularly among people with more severe autism (or among people with autism and other issues such as severe anxiety). People with severe autism may act out by hitting, biting, or kicking. They may also have behaviors such as fecal smearing, door banging, etc. which require a quick and effective response.
  1. Wandering and Eloping. "Eloping" (running away with no obvious cause and no particular destination) is also common among people with severe autism. Unlike higher functioning individuals, people with severe autism don't have the tools to communicate with first responders. This can, of course, increase the likelihood that the individual will wind up in a dangerous situation. In some cases, special locks, alarms, and identification tools are necessary to ensure the safety of a person with severe autism.

Treatments for Severe Autism

There are no treatments that alleviate or cure severe autism as a disorder. There are, however, a wide range of medical and non-medical options for addressing the symptoms of severe autism.

Check for physical issues and food intolerance. Few people with severe autism have the ability to describe physical symptom or problems. Thus, it's a good idea to start by ensuring that a child with severe autism has no physical symptoms that may be exacerbating problem behaviors. It's not uncommon, for example, to discover that a child's apparently aggressive behavior is actually a response to severe gastrointestinal pain which can be treated through dietary changes. Once the pain is gone, the individual finds it much easier to relax, engage, learn, and behave appropriately.

Teach communication skills. Many children with severe autism are non-verbal. Even if they learn to use spoken language, some have a hard time asking or answering questions, and may repeat sounds without assigning meaning to them. On the other hand, many of those same individuals who cannot speak are able to communicate through the use of sign, picture cards, digital talking boards, and keyboards. Communication, of course, is the key to any kind of engagement and learning.

Try non-medical therapies.  Child with severe autism often respond well to Applied Behavior Analysis (ABA), a form of behavioral therapy which is often provided at no charge by school and early intervention programs. Sensory integration therapy can be helpful, as severe autism often comes with serious sensory challenges. Other useful therapies include speech, occupational therapyphysical therapy and, sometimes, play therapy

Medications. Treatments for severe autism usually include medications for anxiety and related issues. Anti-psychotic drugs can also be effective, as can anti-depressants. It's important to carefully monitor you child's responses to drugs, as -- in some cases -- side effects or interactions can cause as many problems as they solve.



D​oyle, Carolyn, et al.Pharmacologic treatments for the behavioral symptoms associated with autism spectrum disorders across the lifespan. Dialogues Clin Neurosci. 2012 Sep; 14(3): 263–279.

Ghaeli, Padideh et al. “Effects of Risperidone on Core Symptoms of Autistic Disorder Based on Childhood Autism Rating Scale: An Open Label Study.” Indian Journal of Psychological Medicine 36.1 (2014): 66–70. PMC. Web. 29 Dec. 2016.

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