Hypermobility and Ehlers-Danlos Syndrome (EDS) co-occur with autism at dramatically elevated rates. A 2025 systematic review of 20 studies found that nearly 39% of autistic people meet the clinical criteria for hypermobility spectrum disorder or EDS. That means almost 4 in 10 autistic children may have a connective tissue condition silently driving their clumsiness, chronic pain, fatigue, toe-walking, and sensory meltdowns. Most families never get told. This article explains what is happening, what to look for, and what to do next.
Quick stats first
- 1 in 31 children in the U.S. is currently identified with autism spectrum disorder, up from 1 in 36 just two years prior (source: CDC Autism and Developmental Disabilities Monitoring Network, 2025)
- A 2025 systematic review of 20 published studies found that 39% of autistic individuals assessed clinically meet diagnostic criteria for hypermobility spectrum disorder or Ehlers-Danlos Syndrome (source: Baeza-Velasco et al., Autism journal, 2025)
- Research led by Dr. Jessica Eccles at Brighton and Sussex Medical School found that over 50% of people diagnosed with autism, ADHD, or Tourette syndrome showed elevated joint hypermobility, compared to just 20% of the general population (source: The Ehlers-Danlos Society, 2023)
What even is hypermobility, and why does it keep coming up with autism?
Hypermobility means your child’s joints move beyond the normal range of motion. Their connective tissue, the stuff holding joints, skin, organs, and blood vessels together, is more elastic than it should be.
Most parents hear “hypermobility” and picture a kid doing party tricks with double-jointed fingers. That is the fun version. The clinical version is different. When connective tissue is lax throughout the body, it affects everything: joint stability, muscle effort, pain signals, the nervous system, the digestive system, and the way the body processes sensory input. Hypermobile EDS (hEDS) is the most common type of Ehlers-Danlos Syndrome, and it involves no reliable genetic test. Diagnosis is clinical, meaning a trained provider has to assess the child in person.
Here is why this matters for autism. Connective tissue is woven through the entire body, including the brain and nervous system. Researchers now believe that overlapping genetic pathways affect both connective tissue development and neurodevelopmental traits. That is why the conditions appear together so often. One Swedish study found that individuals with EDS are 7.4 times more likely to be autistic than people in the general population. That number is not a typo.
I remember sitting in a pediatric rheumatology waiting room and realizing I was the only parent there whose kid was also carrying an autism folder. By the end of the appointment, the doctor mentioned she sees this overlap every single week.
how chronic pain affects autistic children
Why does my autistic child seem so clumsy all the time?
Clumsiness in autistic children with hypermobility is not carelessness. It is a sensory and structural problem with a real physical cause.
When joints are hypermobile, the brain receives poor proprioceptive feedback. Proprioception is your body’s ability to sense where it is in space, how hard to grip, how far to step, when to stop. Autistic children already tend to have proprioceptive processing differences. Add loose joints on top of that, and the proprioceptive signals become even less reliable. The result is a child who bumps into walls, drops things constantly, misjudges distances, trips on flat ground, and cannot seem to sit still in a chair.
That last one is important. A hypermobile child may appear to have terrible posture or to be fidgeting all the time. What they are actually doing is searching for joint stability. Their muscles are working harder than they should just to hold the body upright, because the joints are not doing enough of that work themselves. By the end of a school day, that child is genuinely exhausted in a way that goes beyond what a teacher can see on the surface.
Their trunk, the core of the body, is often the most affected area. A weak or unstable trunk means the child slumps at a desk, avoids fine motor tasks, and struggles with handwriting not because of a learning issue but because holding a pencil requires stabilizing an entire kinetic chain that starts at the hips.
proprioceptive processing differences in autism
Why is my autistic child always complaining about pain, but no one can find anything wrong?
Pain in hypermobile children is real, diffuse, and easy to dismiss. It does not show up on X-rays or standard bloodwork, which means it often gets labeled as anxiety, attention-seeking, or just part of autism.
Hypermobile joints strain the surrounding muscles and ligaments constantly, just to maintain basic function. That low-grade muscular overwork accumulates. A child who says their legs hurt after school is probably not exaggerating. A child who cries during routine grooming tasks like hair brushing or nail cutting may be experiencing amplified pain signals, a feature of hypermobile EDS linked to mast cell activation and nervous system dysregulation.
Gut pain is also common. Connective tissue lines the digestive tract, and when it is lax, gastrointestinal motility problems follow. Constipation, bloating, reflux, and abdominal pain are all reported at higher rates in people with hEDS. Many autistic children already struggle with GI issues. When both conditions are present, those issues tend to be more severe and harder to manage.
Headaches and fatigue round out the picture. Some children with hypermobility also develop orthostatic intolerance, a condition where blood pools in the legs when standing, causing dizziness, brain fog, and rapid heart rate. It can look like anxiety. It can look like a bad sensory day. It is actually a cardiovascular regulatory problem tied to connective tissue laxity.
This is the part that makes parents feel like they are losing their minds. The pain is real. The exhaustion is real. No one is connecting the dots.
hypermobility chronic pain and the nervous system
What are the specific signs my autistic child might have hypermobility or EDS?
These are the physical patterns worth bringing to your child’s pediatrician, physiatrist, or rheumatologist.
W-sitting. Your child sits on the floor with knees bent inward and feet splayed out to the sides, forming a W shape. This is the most stable sitting position for a hypermobile child because it locks the hips and reduces the muscle demand. It is also one of the most commonly dismissed signs.
Toe-walking. Walking on tiptoes without a neurological cause is more common in autistic children with hypermobility. It can serve as a way to seek proprioceptive input and also to compensate for ankle instability.
Loose, floppy joints. You might notice the child’s ankles roll inward when they walk, their fingers bend back past straight, or their elbows hyperextend when they reach for something.
Low muscle tone (hypotonia). This is different from muscle weakness. Hypotonia means the resting tension in the muscle is lower than typical, making it harder to sustain posture and effort over time.
Easy bruising, soft or velvety skin, stretch marks without weight change. These are skin-level signs of connective tissue differences.
Fatigue that is disproportionate to activity. A child who is completely wiped out after a 20-minute walk when peers are still running.
Heightened sensitivity to pain, touch, and temperature. Not just an autism sensory feature, but potentially amplified by a nervous system wired alongside hypermobile connective tissue.
sensory processing differences in autism
If this list is making your child’s life click into place, the expanded guide on supporting sensory and physical needs is in Boundless Love.
How do I actually get my child evaluated for hypermobility or EDS?
Start with your child’s pediatrician and request a referral. Here is how to frame it.
Step 1. Write down the specific physical symptoms before the appointment. Do not lead with autism. Lead with the physical complaints: joint pain, fatigue, toe-walking, W-sitting, easy bruising, recurrent sprains, gut pain. Have a list.
Step 2. Ask for a referral to a pediatric physiatrist (physical medicine and rehabilitation specialist) or a pediatric rheumatologist. Geneticists also evaluate for EDS. Not all rheumatologists are familiar with hEDS. You may need to call ahead and ask if the provider sees connective tissue disorders.
Step 3. Ask the evaluating provider to use the Beighton Score. This is a 9-point clinical tool that measures joint hypermobility. A score of 5 or higher in children suggests generalized hypermobility. It takes about 10 minutes to administer.
Step 4. Bring documentation of the autism diagnosis and any OT or PT evaluations already completed. Hypermobile EDS diagnosis is clinical and contextual. More documentation helps.
Step 5. If you are dismissed, ask specifically whether your child has been assessed for hypermobile EDS or hypermobility spectrum disorder (HSD). These are two separate diagnoses. HSD is the more common entry point and does not require meeting the full hEDS criteria.
OT and PT for autistic children
How does treating hypermobility actually help with autism-related challenges?
Addressing hypermobility can reduce sensory overwhelm, behavioral dysregulation, and fatigue in autistic children. It does not change autism. It removes pain and instability that were making everything harder.
Physical therapy focused on joint stabilization gives the body the structural support the connective tissue is not providing. That means less pain, less muscle fatigue, and better proprioceptive feedback. Better proprioception means better body awareness, which translates to less clumsiness, less sensory-seeking behavior, and more capacity for self-regulation.
Occupational therapy targeting interoception helps the child develop more accurate awareness of internal body signals, including pain, fatigue, hunger, and heart rate. When a child cannot accurately read what their body is feeling, they cannot communicate it or regulate around it. Interoception work addresses the exact gap where autism and hypermobility collide.
interoception and autism
Aquatic therapy reduces joint load while still building strength. It is one of the most effective PT modalities for hypermobile children who cannot tolerate high-impact exercise.
Compression garments provide external joint support and proprioceptive input simultaneously. Many hypermobile autistic children respond powerfully to wearing compression shorts, sleeves, or full-body suits. This is not a placebo. It is giving the joints the feedback they are not generating themselves.
Adaptive seating and classroom accommodations also matter. A child who cannot maintain seated posture due to trunk hypotonia needs a supportive chair, movement breaks, and access to alternative work positions. That is not an indulgence. It is a physical necessity.
occupational therapy sensory and motor intervention for autism
Frequently asked questions
What is hypermobility in a child with autism?
Hypermobility in an autistic child means their joints move beyond the typical range of motion due to laxer-than-normal connective tissue. It commonly presents as low muscle tone, clumsiness, chronic pain, easy fatigue, W-sitting, and toe-walking. In autistic children, it is frequently missed because many of these signs are attributed to autism alone.
Can hypermobility cause meltdowns in autistic children?
Yes, indirectly. Chronic pain, fatigue, and unreliable proprioceptive input all increase the sensory and regulatory load a child is carrying. A child in low-grade pain all day has a significantly reduced window for tolerating additional sensory or emotional demands. Reducing physical pain through PT and OT can meaningfully reduce the frequency and intensity of meltdowns.
What is W-sitting and why should I care about it?
W-sitting is a floor-sitting position where the child’s knees point forward and feet splay outward behind them, creating a W shape when viewed from above. It is a compensation strategy for hypermobile hips that reduces the muscle work needed to stay upright. Long-term W-sitting can shorten hip flexors and limit core development. If your child defaults to this position, it is worth mentioning to a PT.
What is the difference between EDS and hypermobility spectrum disorder?
Both involve joint hypermobility beyond the typical range and can cause pain and fatigue. Hypermobile EDS (hEDS) has additional diagnostic criteria including specific family history, skin features, and musculoskeletal features. Hypermobility spectrum disorder (HSD) is diagnosed when a person has symptomatic hypermobility but does not meet the full hEDS criteria. Both are real, both cause significant symptoms, and both benefit from the same general treatment approach.
Why does my autistic child toe-walk?
Toe-walking without a neurological cause is more common in autistic children with hypermobility. It can serve as a way to increase proprioceptive input, to compensate for ankle instability, or to reduce the discomfort caused by flat-footed contact with unpredictable surfaces. A PT evaluation can identify the specific driver and guide intervention.
How do I find a doctor who understands both autism and hypermobility?
Ask your child’s pediatrician for a referral to a pediatric physiatrist or pediatric rheumatologist and specifically mention that you are concerned about connective tissue hypermobility in the context of autism. You can also ask whether the provider has experience with hypermobile EDS or hypermobility spectrum disorder. Calling the scheduling line before booking is worth doing. Many families have found useful guidance through the Ehlers-Danlos Society’s provider directory.
Is chronic fatigue in autistic children related to hypermobility?
It can be. Hypermobile children expend significantly more muscular energy just to hold their bodies upright and move through daily activities, because their joints are not providing the structural stability that connective tissue normally would. Add in potential dysautonomia, disturbed sleep from pain, and the cognitive effort of managing sensory differences, and fatigue becomes a core feature rather than a side effect.
Can occupational therapy help with hypermobility and autism together?
Yes. OT is one of the most effective interventions for children with both conditions. Occupational therapists trained in sensory integration work on body awareness, proprioception, fine motor stability, and interoception, all of which are directly affected by hypermobility alongside autism. Look for an OT with experience in both sensory processing and pediatric connective tissue conditions.
What to remember
Your child is not clumsy because they are not trying hard enough. They are not exhausted because they are lazy. They are not in pain because they want attention. They have a body that is working significantly harder than most people realize, and the medical system is just starting to catch up to what many parents have known for years. Getting an evaluation for hypermobility does not change who your child is. It gives you one more piece of the picture, and one more tool to actually help them.
If you want practical strategies for supporting your child’s sensory and emotional needs at every stage, Boundless Love is written for exactly this kind of parent. The one who is paying attention, asking the right questions, and refusing to accept “that is just autism” as a complete answer.
