Repetitive Stress Injuries and Workers’ Comp in Illinois

Not Every Workplace Injury Happens in a Single Moment

When people think of workplace injuries, they picture sudden accidents. A fall from a ladder. A machine that malfunctions. A heavy object that drops on someone. Those are real and serious injuries. But some of the most debilitating workplace injuries develop slowly, over weeks, months, or years of doing the same motions over and over.

These are called repetitive stress injuries, also known as repetitive strain injuries or cumulative trauma injuries. They are covered by Illinois workers’ compensation, but filing a claim for them is more challenging than filing for a sudden accident. The insurance company will push back harder. The burden on you to prove the connection between your work and your condition is heavier.

Here is what you need to know about repetitive stress injuries and workers’ comp in Illinois.

What Are Repetitive Stress Injuries?

Repetitive stress injuries develop when the same physical motion is performed repeatedly, causing damage to muscles, tendons, nerves, or joints over time. The individual motions may seem harmless. But when you do them hundreds or thousands of times a day, five days a week, for months or years, the cumulative effect can be severe.

Common Repetitive Stress Injuries

• Carpal tunnel syndrome: Compression of the median nerve in the wrist. Common among office workers, assembly line workers, and anyone who performs repetitive hand and wrist motions.
• Tendonitis: Inflammation of tendons, often in the wrists, elbows, shoulders, or knees. Caused by repetitive motions or sustained awkward positions.
• Tennis elbow (lateral epicondylitis): Pain and inflammation on the outside of the elbow. Common among workers who repeatedly grip, twist, or lift objects.
• Rotator cuff injuries: Damage to the shoulder muscles and tendons from repeated overhead motions. Common among painters, electricians, and warehouse workers.
• Bursitis: Inflammation of the small fluid-filled sacs that cushion joints. Often affects knees, shoulders, and elbows.
• Trigger finger: A condition where a finger gets stuck in a bent position due to inflammation of the tendon sheath. Common among workers who repeatedly grip tools.
• Herniated discs: Repeated heavy lifting and bending can cause disc damage in the spine over time.
• De Quervain’s tenosynovitis: Pain and swelling in the tendons on the thumb side of the wrist.

Who Is at Risk?

Almost any worker who performs the same physical tasks repeatedly is at risk. But some jobs have higher rates of repetitive stress injuries than others:

• Office and computer workers: Typing, mouse use, and sitting in the same position for hours cause carpal tunnel, neck pain, and back problems.
• Assembly line workers: The same hand, arm, and shoulder motions repeated thousands of times per shift.
• Warehouse and distribution workers: Lifting, scanning, packing, and sorting in repetitive cycles.
• Construction workers: Hammering, drilling, painting, and working overhead for extended periods.
• Healthcare workers: Lifting patients, repetitive charting, and sustained standing.
• Meatpacking and food processing workers: Cutting, trimming, and deboning motions repeated constantly.
• Delivery drivers: Repetitive lifting and carrying of packages combined with driving.

How Illinois Workers’ Comp Handles Repetitive Stress Injuries

Illinois treats repetitive stress injuries as occupational diseases under the Workers’ Occupational Diseases Act (820 ILCS 310). This is different from the Workers’ Compensation Act that covers sudden injuries. The rules are similar but not identical.

The Key Requirement: Work Connection

To get workers’ comp benefits for a repetitive stress injury, you must show that your condition arose out of and in the course of your employment. More specifically, you need to prove that your work exposed you to a risk of developing the condition to a greater degree than the general public.

This is where things get tricky. Carpal tunnel syndrome, for example, can develop from many activities, not just work. The insurance company will argue that your condition is due to hobbies, aging, or genetics rather than your job. You need medical evidence linking your specific work activities to your specific condition.

Notice Requirements

For repetitive stress injuries, the notice rules are different from sudden accidents. You must notify your employer within 45 days of when you knew or should have known that your condition was work-related. This is not 45 days from when you first felt pain. It is 45 days from when a reasonable person would have connected the condition to their work.

In practice, this often means 45 days from when a doctor tells you that your condition is related to your work activities. But do not wait for a formal diagnosis. Report your symptoms and their connection to your work as soon as you suspect the link.

Statute of Limitations

You have three years from the date of disability (or the date you knew the condition was work-related) to file an Application for Adjustment of Claim with the Illinois Workers’ Compensation Commission. The outside limit is 25 years from the last date of exposure to the conditions that caused the disease.

Proving Your Repetitive Stress Injury Claim

This is the hardest part. Insurance companies fight repetitive stress claims aggressively because the cause-and-effect relationship is not as obvious as it is with a sudden accident. Here is how to build a strong case:

Medical Evidence

You need a doctor who will clearly state that your condition was caused by your work activities. General statements like “could be work-related” are not enough. You need a specific opinion that your job duties, performed over a specific period of time, caused or significantly contributed to your condition.

The doctor should explain the mechanism. For example: “The patient’s carpal tunnel syndrome was caused by performing repetitive keystrokes and mouse movements for approximately 7 hours per day, 5 days per week, over a period of 8 years.”

Job Description and Duties

Document exactly what you do at work. How many times per hour do you perform the repetitive motion? How many hours per day? What tools do you use? What postures does your job require? Is there any variation in your tasks, or do you do the same thing all day?

The more specific you are, the stronger your case. Vague descriptions like “I use a computer” are much weaker than “I type approximately 8,000 keystrokes per hour using a standard keyboard with no wrist rest, in a chair with no adjustable armrests, for 7.5 hours per day.”

Timeline of Symptoms

Keep a record of when your symptoms started, how they have progressed, and what makes them better or worse. If your symptoms get worse during the work week and improve on weekends or vacations, that pattern supports a work-related cause.

Ergonomic Assessments

If your workplace has been evaluated for ergonomic hazards, get copies of those reports. If it has not been evaluated, an ergonomic expert can assess your workstation and testify about how your working conditions contributed to your injury.

Benefits for Repetitive Stress Injuries

If your claim is approved, you are entitled to the same benefits as any other workers’ comp claim:

• All medical treatment related to the condition
• Temporary total disability if you cannot work
• Permanent partial or permanent total disability
• Vocational rehabilitation if you cannot return to the same type of work

For conditions like carpal tunnel syndrome, treatment may include wrist splints, physical therapy, cortisone injections, and in some cases surgery. All of it should be covered by workers’ comp.

Common Challenges in Repetitive Stress Claims

The “Pre-Existing Condition” Defense

Insurance companies love to blame pre-existing conditions. If you had any prior problems with the affected body part, they will argue your current condition is not work-related. Under Illinois law, your claim is still valid if your work activities aggravated, accelerated, or worsened a pre-existing condition. You do not have to prove that work was the only cause.

Delayed Diagnosis

Because repetitive stress injuries develop gradually, there is often a long gap between when symptoms start and when a formal diagnosis is made. Insurance companies use this delay to argue that the condition is not serious or not work-related. See a doctor as soon as symptoms appear, and tell the doctor about your work activities.

Employer Retaliation

Some employers react badly when workers file repetitive stress claims. They may argue you are exaggerating, try to change your job duties, or find excuses to discipline or terminate you. Illinois law prohibits retaliation for filing a workers’ comp claim. If your employer retaliates, you may have a separate legal claim for retaliatory discharge.

Prevention and Accommodation

If you notice early symptoms of a repetitive stress injury, address them before they become severe:

• Ask your employer for ergonomic modifications to your workstation
• Take regular breaks from repetitive tasks
• Use proper technique and body mechanics
• Report symptoms early, even if they seem minor
• See a doctor at the first sign of persistent pain, numbness, or weakness

Early intervention often prevents a manageable condition from becoming a life-changing disability.

When to Talk to a Lawyer

Repetitive stress injury claims are harder to win than claims for sudden accidents. The medical causation issues are more complex. Insurance companies fight harder. The stakes are high because these injuries can end careers.

If you are experiencing symptoms of a repetitive stress injury from your work, talk to an attorney who understands both the medical and legal aspects of these claims. Hiring a lawyer early in the process helps you build the evidence you need and avoid common mistakes that can sink your claim.

Do Not Ignore the Warning Signs

Repetitive stress injuries do not get better on their own if you keep doing the same work. They get worse. If your job is causing persistent pain, numbness, tingling, weakness, or limited range of motion, you may have a valid workers’ comp claim in Illinois.

Call Phillips Law Offices at (312) 346-4262 or contact us online at /contact/ for a free consultation.