Understanding Upper Limb Difference (ULD) Overuse Syndrome
What parents and practitioners need to know
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The amazing human body
What is overuse syndrome?
Causes of overuse syndrome
Why are people with upper limb differences at higher risk?
When does overuse syndrome usually start?
How does overuse syndrome develop?
What parents and practitioners can do
Final thoughts
Free resource
Quick links
Learn more
The amazing human body
The human body — with typical or atypical limbs — is incredible. Although bodies are designed to be symmetrical, they can and do adapt in marvelous and ingenious ways. Every day, children and adults with upper limb differences (ULD) are living their lives to the fullest: playing sports, cooking, creating, and so much more.
At the same time, when a child has one hand or arm that functions differently, the unaffected side often does more. This may not cause problems at first, but over time, the extra strain adds up. This can lead to a painful condition called overuse syndrome, which can last for months or even years. From the time children with one-sided limb differences are young, we need to pay close attention to how much they use the unaffected side of the body.
What is overuse syndrome?
Overuse syndrome is when pain or fatigue sets in because of repeating the same motions over and over. It’s also called:
- Repetitive strain injury (RSI)
- Repetitive motion disorder (RMD)
- Cumulative trauma disorder (CTD)
- Occupational overuse syndrome (OOS)
It often starts in the hands or arms and can spread to the shoulder, back, and neck if not addressed.
Causes of overuse syndrome
- Repeating the same movements often
- Using high force or awkward postures
- Not enough rest
- Weak or tired muscles
- Poor posture or body mechanics
- Stress or untreated mental health challenges
Why are people with upper limb differences at higher risk?
People with one-sided upper limb differences often rely heavily on one side of their body. Over time, that side can become overworked, especially if the limb-different side isn’t used as much.
A recent research study of adults with congenital one-sided ULD by Jenkins, 2025 found:
- 82% reported overuse symptoms
- 60% said the pain began by age 25
- 41% said the pain began by age 20
Compare that to the general population, where upper limb pain affects only about 16–24% of people under age 45. That’s a big difference!
When does overuse syndrome usually start?
We used to think that overuse syndrome started in middle age. But we now know that the condition often begins in childhood or young adulthood, but it can be missed or ignored for years. That’s because physically active children and teens with upper limb differences may not realize that the aches they feel are not “typical” or they may be so used to compensating for their difference that they push through discomfort.
How does overuse syndrome develop?
Overuse syndrome develops in stages over time. Catching overuse syndrome early in either arm or hand can prevent symptoms from worsening. Because it‘s easy to ignore pain, learning to recognize the stages for oneself or a loved one (child, spouse, friend) and noticing patterns of ignoring or pushing through pain can help reduce the risk of overuse syndrome.
The four stages of overuse syndrome
- Stage 1: pain occurs after activity:
- Pain or tiredness after activity, goes away with rest
- Example: pain and/or fatigue after cooking, playing sports, or typing one-handed
- Stage 2: pain occurs during activity — but doesn’t affect performance
- Pain starts during activity, may last into the next day; rest and over the counter anti-inflammatory medication bring relief
- Example: pain and/or fatigue during cooking, playing sports, or typing one-handed
- Stage 3: serious aching, fatigue, pain — and limits performance
- Pain limits participation; rest and over the counter anti-inflammatory medication offer limited relief
- Example: pain and/or fatigue limit ability to cook, play sports, or type one-handed
- Stage 4: chronic pain even at rest
- Constant pain, aching, fatigue, and pain, even at rest. Muscles may weaken. Sleep and daily life are affected.
- Example: constant pain and/or fatigue in either hand/arm, back, neck, shoulder
What parents and practitioners can do
You’re already doing so much to support your child. Here are a few more ways to prevent overuse syndrome:
- Encourage use of both sides during daily tasks
- Use tools and assistive devices that make using the limb-different side easier
- Support strength, posture, and endurance through safe movement
- Watch for signs of fatigue or pain and respond early
- Adapt technology and activities — not your child — to reduce strain
- Work with a pediatric occupational therapist who understands limb differences
- Teach your child about listening to their body and taking breaks
Final thoughts
Children with upper limb differences are capable, smart, and strong. Let’s support them by protecting their bodies, not just now, but for the long term.
By making small changes early and being aware of the signs of overuse, we can help them grow healthy, confident, and balanced bodies.
Free resource: 👇download the free printable copy of the Upper Limb Difference (ULD) Overuse Syndrome: prevent, reduce, treat infographic
Quick links
- Want a personalized consultation to discuss how to help your child avoid overuse syndrome? Schedule a consult in Ohio with me!
- Technology is a big contributor to overuse syndrome. Learn how to adapt technology to your child’s upper limb difference – and download the free handout!
- Learn about the Overachiever Trap
- Learn about Occupational Therapy for children with upper limb differences
- To learn more about overuse syndrome, follow our series on Instagram
Learn more
For more education on overuse prevention, adaptive tools, and supporting strong, balanced bodies, follow on Instagram and subscribe to our newsletter. To access more overuse syndrome information, visit the overuse syndrome hub.
© 2026. Laura Faye Clubok, MS, OTR/L, On The Other Hand Therapy. All rights reserved.