Work-Related Musculoskeletal Disorders

Overview

Work-related musculoskeletal disorders (WRMSDs) are a broad group of conditions affecting the muscles, tendons, ligaments, nerves, and joints that arise from, or are aggravated by, the physical demands of work. They include problems such as carpal tunnel syndrome, tendinitis, and back pain.

These disorders develop most often when the same movements are repeated many times, when force or heavy lifting is involved, or when the body is held in awkward positions for long periods. They are among the most common reasons for time off work and can affect people in offices, factories, healthcare, construction, and many other settings. The good news is that many WRMSDs can be prevented or improved by changing how tasks are done.

Symptoms

Symptoms vary depending on which part of the body is affected, but they typically build up gradually and may at first appear only during or after work.

• Aching, soreness, or pain in muscles or joints
• Stiffness, especially after periods of activity or rest
• Swelling or a feeling of tightness
• Numbness, tingling, or pins and needles, often in the hands or fingers
• Weakness or reduced grip strength
• Reduced range of movement

Early on, symptoms may settle with rest overnight or over a weekend. If the cause continues, pain can become more constant and harder to treat.

Causes

WRMSDs are caused by physical strain on the body that exceeds what the tissues can comfortably tolerate and recover from. Several work-related factors contribute, often in combination:

• Repetition: performing the same movements over and over, such as typing, scanning items, or assembly tasks.
• Force: lifting, pushing, pulling, or gripping with effort.
• Awkward postures: bending, twisting, reaching overhead, or sitting in poor positions.
• Static postures: holding one position for long periods.
• Vibration: using power tools or machinery, which can damage nerves and blood vessels in the hands.
• Insufficient recovery: too few breaks or rest periods between demanding tasks.

Risk Factors

• Jobs with repetitive or forceful manual tasks
• Poor workstation or tool design
• Lifting and manual handling without aids
• Long hours without breaks
• Cold working environments
• High work pressure and stress
• Older age and reduced fitness
• Pre-existing conditions such as arthritis

Diagnosis

Diagnosis is based mainly on symptoms and a careful look at the person's work tasks and history. A health professional will ask when symptoms started, what makes them better or worse, and how they relate to work.

• Physical examination: checking movement, strength, tenderness, and nerve function.
• Work assessment: reviewing the tasks, equipment, and postures involved, sometimes called an ergonomic assessment.
• Tests where needed: nerve conduction studies for suspected nerve compression, or imaging such as ultrasound or X-ray for joint or tendon problems.

Treatment

Treatment aims to relieve symptoms, allow the tissues to recover, and remove or reduce the cause so the problem does not return.

• Modifying the task: changing how, how often, or how long a task is done is central to recovery.
• Rest and activity balance: short of complete inactivity, which can prolong problems; gentle movement is usually encouraged.
• Physiotherapy: exercises to restore strength, flexibility, and posture.
• Pain relief: simple painkillers, ice or heat, and sometimes anti-inflammatory medication.
• Ergonomic changes: adjusting chairs, desks, tools, and lifting methods.
• Specific treatment: such as wrist splints for carpal tunnel syndrome or, rarely, injections or surgery for severe cases.

Prevention

Prevention focuses on designing work to fit the worker, often called ergonomics:

• Set up workstations so screens, keyboards, and chairs support good posture
• Use lifting aids and proper manual handling techniques
• Take regular short breaks and vary tasks to avoid repetitive strain
• Reduce force by using well-maintained tools and equipment
• Report early symptoms so changes can be made before injury worsens
• Keep generally fit and active to build resilience

When to See a Doctor

See a doctor or occupational health professional if work-related aches, pain, numbness, or weakness last more than a week or two, keep coming back, or interfere with your job or daily life. Seek prompt medical attention if you have:

• Persistent numbness or tingling in the hand or fingers
• Noticeable loss of grip or muscle strength
• Severe or worsening pain that does not settle with rest
• Swelling, redness, or warmth over a joint

Reporting symptoms early gives the best chance of recovery and helps prevent long-term disability.

Related Topics

Frequently Asked Questions

References

1. Centers for Disease Control and Prevention (CDC), National Institute for Occupational Safety and Health (NIOSH).
2. Mayo Clinic. Repetitive strain and overuse injuries.
3. MedlinePlus, U.S. National Library of Medicine. Repetitive motion injuries.
4. Occupational Safety and Health Administration (OSHA). Ergonomics.