Carpal tunnel syndrome (CTS) occurs when the median nerve becomes compressed as it passes through the wrist, resulting in symptoms such as numbness, tingling, weakness, burning sensations, or pain in parts of the hand. Workplace factors such as forceful gripping, repetitive movements, awkward wrist positions, and vibrating tools are well-known contributors to CTS; however, researchers are increasingly identifying additional workplace exposures that may play a role in CTS risk over time, especially in combination with the following factors:

• Non-traditional shift work: Shift work can disrupt normal sleep cycles and circadian rhythms, potentially increasing systemic inflammation, impairing tissue recovery, and altering pain sensitivity. Fatigue may also contribute to poorer posture, reduced coordination, or increased muscle tension during repetitive tasks.
• Toxic substances: Certain industrial chemicals and solvents are known to contribute to peripheral nerve irritation or neuropathy. Repeated exposure may make nerves more vulnerable to compression injuries, including irritation of the median nerve within the carpal tunnel.
• Secondhand smoke: Tobacco smoke exposure may impair circulation and reduce oxygen delivery to tissues. Nicotine-related vascular changes and chronic inflammation may negatively affect nerve health and slow healing of irritated tissues surrounding the wrist.
• Extreme temperatures: Cold environments can reduce blood flow, increase tissue stiffness, and slow nerve conduction. Workers exposed to cold conditions often experience increased muscle tension and reduced hand dexterity, potentially increasing strain on tendons and surrounding soft tissues. Repeated heat exposure may also contribute to tissue swelling.
• Loud noise: Chronic noise exposure has been associated with increased physiologic stress responses, elevated stress hormone levels, and greater muscle tension. Some researchers suggest these stress-related changes may indirectly contribute to musculoskeletal disorders, particularly when combined with repetitive or physically demanding work activities.

While reducing exposure to these risk factors may not always be possible in certain occupations, chiropractic care aimed at improving biomechanics, reducing mechanical stress on the median nerve, and addressing muscle and joint dysfunction in the upper extremity may play a role in managing the condition and helping workers perform daily job tasks more comfortably.