The treatment works by stimulating beneficial biological processes at the cellular level.
Improved Mitochondrial Function
Inside each cell are tiny organelles called mitochondria, which convert raw materials into the energy a cell needs to function properly. Factors such as chronic inflammation can interfere with mitochondrial function.
The ripple effect of this mitochondrial dysfunction includes slow healing and abnormal cell death.
Red light therapy stimulates the mitochondria to produce more adenosine triphosphate (ATP) which is the cell’s primary fuel. It promotes the health of emerging cells and supports cells that are damaged, speeding up healing and thus shortening the duration of pain.
Reduced Inflammation
Acute inflammation is a beneficial process that is part of the healing process. It manifests as pain, swelling, redness, and tenderness. However, as tissues heal, inflammation subsides so that normal function is restored to the area.
Chronic inflammation present anywhere in the body, even away from the site of the injury or pain, can negatively affect healing. Red light therapy has a powerful anti-inflammatory effect.
Increased Circulation
Red light therapy boosts the body’s production of nitric oxide (NO) which is a vasodilator that temporarily increases the diameter of blood vessels to improve circulation. Better circulation means more oxygen and nutrients are delivered to the hand to support healing.
Pain Relief
It may seem strange that light can soothe pain. The treatment reduces pain intensity in musculoskeletal conditions including osteoarthritis knee pain, fibromyalgia, low back pain, neck pain, and pain due to temporomandibular diseases.
The treatment generates a small amount of soothing warmth. The analgesic effects of red light therapy occur within minutes, and the effects “last longer than those of widely recommended painkiller drugs.”
Cartilage Regrowth/Collagen Production
We tend to think of collagen as the protein that makes up most of the skin. It is also present in all connective tissue and muscle. Red light has been found to stimulate collagen production in muscles and tendons.
Stimulating collagen production can speed up healing of musculoskeletal conditions, to shorten the duration of pain.
Although it has long been thought that damaged cartilage cannot be regenerated, recent research indicates that red light therapy may in fact support regrowth of cartilage that has been damaged by overuse injuries.
A 2021 review of 33 studies revealed that red light therapy reduced inflammation, reduced the degradation of the extracellular matrix (ECM), or connective tissue including cartilage. The treatment slowed osteoarthritis progression and promoted ECM synthesis which means cartilage regrowth.
Nerve Restoration
Nerve pain, as well as numbness, can be treated using red light therapy. Red light therapy has been used to successfully treat diabetic neuropathy; and although this condition tends to affect the feet, the same treatment can be used on the hands to stimulate nerve regrowth and functional restoration due to injury or an inflammatory disorder.
Bone Regrowth
Red light therapy can also help in the event of a bone break in the hand. Deep-penetrating near infrared and infrared wavelengths stimulate proliferation of osteoblasts, which are the cells that grow bone.
RLT for Arthritis
According to the Arthritis Foundation, “nearly half of all women and one quarter of all men will experience the pain and stiffness of osteoarthritis in their hands by the time they are 85 years old.”
We’ve discussed the ways that red light therapy treats pain as well as promotes healing. These mechanisms can help treat pain from both osteoarthritis and rheumatoid arthritis by reducing joint inflammation.
You can treat arthritis in the hands with 5-20 minute daily red light therapy sessions.
Preventive light therapy as well as starting treatment after symptoms have developed can slow or even halt the progression of the disease.
RLT for Wrist Pain
Carpal tunnel syndrome, sprains, fractures, ganglion cysts, and Kienbock disease (where one of the small bones in the wrist gradually collapses due to loss of blood flow) are common causes of wrist pain.
The many ways that red light therapy supports the body’s natural healing processes, including tissue regeneration, to improve these conditions.
Regular treatment is best, to both prevent pain due to overuse injury and to treat existing pain.