Hand Pain

Last updated: July 2025

Wavelengths • Red light: ~620–700 nm (commonly 630 or 660 nm) • Near-infrared (NIR): ~700–1100 nm (commonly 810, 830, 850 nm) Key difference • Red light penetrates superficial tissues (skin, joints close to surface) • NIR penetrates deeper tissues (muscles, tendons, nerves, joint capsules) Hands benefit from both, because they contain superficial joints and deeper tendons/nerves in a compact space.

A. Mitochondrial Stimulation (Energy Production) Light is absorbed by cytochrome c oxidase in mitochondria. It increases ATP (cellular energy), which leads to better tissue repair, faster healing, and improved cellular resilience. This is crucial in: • Degenerating cartilage (arthritis) • Compressed or damaged nerves (carpal tunnel) • Overused tendons (tendonitis) B. Reduction of Inflammation PBM reduces inflammatory signaling by decreasing pro-inflammatory cytokines (TNF-α, IL-1β, IL-6), increasing anti-inflammatory mediators, and reducing oxidative stress. This directly helps with swelling, joint stiffness, and pain from chronic inflammation. C. Improved Blood Flow & Oxygenation • Promotes nitric oxide (NO) release • Causes vasodilation • Improves microcirculation Hands have small blood vessels, so circulation improvements can significantly reduce stiffness, cold sensitivity, and slow healing. D. Nerve Modulation & Pain Reduction PBM reduces nerve hypersensitivity, stabilizes nerve membranes, slows pain signal transmission, and encourages nerve regeneration in damaged fibers. This is key for neuropathic hand pain.

A. Arthritis (Osteoarthritis & Rheumatoid Arthritis) • What causes the pain? Cartilage degeneration, synovial inflammation, joint capsule thickening, reduced joint lubrication. • How RLT helps: Reduces joint inflammation, improves synovial fluid dynamics, decreases stiffness, and may slow cartilage breakdown. • Benefits seen: Reduced pain during movement, improved grip strength, decreased morning stiffness, less swelling around knuckles. • Best wavelengths: Red (630–660 nm) for superficial joints (knuckles); NIR (810–850 nm) for deeper joint structures. B. Carpal Tunnel Syndrome (CTS) • What causes the pain: Median nerve compression in the wrist, inflammation of surrounding tendons, reduced blood supply to the nerve. • How RLT helps: Reduces inflammation in flexor tendons, improves nerve blood flow, supports nerve repair and remyelination, and reduces nerve pain and tingling. • Symptoms it improves: Tingling and numbness, burning pain, weak grip, night pain. • Best wavelengths: NIR (810–850 nm) is especially important due to nerve depth. C. Tendonitis & Tenosynovitis (e.g., De Quervain’s, trigger finger) • What causes the pain: Tendon overuse, micro-tears, tendon sheath inflammation. • How RLT helps: Increases fibroblast activity, improves collagen alignment, reduces tendon swelling, and speeds micro-repair. • Results: Less pain with gripping, reduced clicking or locking, and faster recovery from repetitive strain. D. Neuropathic Hand Pain (Nerve Damage, Compression, Diabetes) • Causes: Nerve injury, chronic compression, metabolic damage. • How RLT helps: Supports nerve regeneration, reduces abnormal pain signaling, and improves mitochondrial function in nerve cells. This is especially relevant when pain burns, tingles, shoots, or persists without visible inflammation. E. Post-Injury or Post-Surgical Hand Pain RLT can reduce scar tissue formation, improve circulation, accelerate healing, and reduce chronic post-traumatic pain.

• Frequency: 5–7 sessions per week • Chronic conditions may require ongoing use • Session duration: 5–15 minutes per area • Avoid overdosing (more is not always better) • Consistency matters more than intensity

Generally safe, but caution with: • Active cancer directly at treatment site • Pregnancy over uterus (hands usually safe) • Photosensitizing medications • Direct eye exposure (eye protection recommended)

Red and near-infrared light therapy helps hand pain by energizing cells, calming inflammation, improving circulation, and stabilizing nerve signaling. It is particularly helpful for arthritis, carpal tunnel syndrome, tendonitis, and neuropathic pain, especially when used consistently and early. ***