Knee Pain & Cold Laser Therapy:

Knee pain is among the leading causes of lost mobility and independence. However, in my experience, they are rarely explained in terms that make biological sense. People are told their joints are “just wearing out,” as if they were disposable hinges. 

In reality, joints are living structures, rich with blood vessels, nerves, and cells that constantly repair and remodel themselves, naturally. Pain occurs when that process of renewal slows down. 

At the Liebell Clinic, we approach knee and joint pain not as inevitable deterioration but as an energy crisis in motion. Cold laser therapy, scientifically known as photobiomodulation, helps restore that energy so the body can resume its own repair work. Every joint depends on the cooperation of cartilage, ligaments, tendons, and surrounding muscles. These tissues must receive oxygen and nutrients through the tiny capillaries that feed them. 

When circulation declines or inflammation increases, the cells responsible for repair, the chondrocytes and fibroblasts lose power. Mitochondria, the microscopic generators inside every cell, begin to falter, producing less adenosine triphosphate, abbreviated ATP. Without ATP, the joint cannot maintain its collagen network or control inflammation. 

Cold laser therapy uses specific wavelengths of light to reignite these mitochondrial processes. The light is absorbed by enzymes that trigger ATP production, improve oxygen utilization, and release nitric oxide, which increases local blood flow. The result is renewed energy and a reduction of the chemical stress that fuels pain.

Inflammation plays a central role in nearly all joint pain. It causes swelling, stiffness, and the slow degradation of cartilage. Cold laser therapy photobiomodulation helps regulate this process rather than simply suppressing it. 

Studies show that laser light reduces pro-inflammatory cytokines such as tumor necrosis factor-alpha and interleukin-6 while increasing anti-inflammatory messengers like interleukin-10. This biochemical balance allows tissue to heal while minimizing further damage. Patients often notice gradual reductions in swelling and stiffness after a series of treatments as joint movement becomes easier and more natural. 

Knee joints endure immense pressure—up to four times a person’s body weight with each step. Over time, repetitive stress can cause microtears in the connective tissue and thinning of cartilage. Photobiomodulation stimulates fibroblasts to produce new collagen fibers, strengthening the ligaments and joint capsule. It also enhances the production of growth factors that guide the rebuilding of cartilage. Laboratory research confirms improved collagen alignment and greater tensile strength in tissues exposed to low-level laser therapy. These effects explain why many patients regain not only comfort but also stability.

Muscle weakness often accompanies joint pain because pain itself discourages movement. When muscles around the knee or hip become deconditioned, they place even more stress on the joints. Cold laser therapy helps reverse this cycle by improving local energy metabolism in the muscle fibers and reducing oxidative stress. This enables more efficient muscle contraction and recovery after exercise or rehabilitation. For individuals rebuilding strength after injury, as well as knee sugery, cold laser photobiomodulation supports faster adaptation and less soreness. 

Cartilage health is another critical factor. While cartilage has limited direct blood supply, its cells respond to biochemical signals from the surrounding tissues. When inflammation and oxidative stress are reduced, the environment becomes more favorable for cartilage maintenance. 

Cold laser therapy helps create those conditions by increasing antioxidant enzymes and improving the exchange of nutrients through synovial fluid. It's a magnificent complementary treatment to Dr. Breiten Liebell's physical and mechanical treatment of the knee directly, along with the necessary and extremely helpful total-body approach for people with knee problems. I (Dr. Donald Liebell) have used cold laser therapy for over 20 years to help people (patients, family, and friends) with knee problems.

The Liebell brothers (my sons) now provide you with teamwork to help you, based on my 33 plus years of experience, and their modern know-how and skills, and our truly state-of-the art cold laser technology. With a combination of Dr. Breiten Liebell's chiropractic and other direct body joint treatments, and laser therapist, Evan Liebell's support, patients can experience improved range of motion and less grinding or crepitus after treatment—signs that the joint surfaces are moving more smoothly.

Knee pain is not just mechanical; nerves play a major part. When the joint is inflamed, nearby sensory nerves become hypersensitive, amplifying discomfort. Cold laser therapy photobiomodulation calms these nerves by stabilizing their electrical activity and improving their ability to transmit accurate signals. The result is less burning, aching, or referred pain down the leg. This is particularly valuable for individuals with combined joint and nerve irritation, such as those recovering from back or hip problems.

Cold laser therapy knee treatments are simple, painless, and require no downtime. We use FDA-cleared Erchonia medical lasers designed for biological precision. 

The light is non-thermal, meaning it produces no heat or tissue damage. Each session lasts only minutes, but the biochemical effects continue for hours as energy production increases. Over time, inflammation subsides, flexibility improves, and movement becomes easier. 

When integrated with chiropractic care, and other Liebell Clinic procedures, the results are amplified, restoring both comfort and confidence in daily activity.

Scientific studies validate these observations. Clinical trials published in Lasers in Medical Science, Clinical Rehabilitation, and Photomedicine and Laser Surgery report significant improvements in pain, stiffness, and functional ability for patients with knee osteoarthritis and ligament injury following low-level laser therapy. Histological analyses reveal enhanced collagen organization and reduced oxidative stress in treated joints. 

Meta-analyses confirm that cold lasser photobiomodulation decreases inflammatory markers and accelerates tissue regeneration compared to standard care alone. These results echo what we witness daily in clinical practice: when cellular energy returns, the joint regains life.

Joint pain does not have to mean decline. The body’s capacity to rebuild remains intact—it simply needs energy and direction. 

Cold laser therapy provides both. 

By restoring power to the cells that maintain joint health, it transforms recovery from a slow struggle into a guided biological process.

Selected Scientific References

de Carvalho PTC et al. Low-level laser therapy in knee osteoarthritis: randomized clinical trial and mechanistic analysis. Lasers Med Sci. 2012;27(1):181–189.
Tomazoni SS et al. Infrared low-level laser therapy restores mitochondrial function and reduces oxidative stress in articular cartilage. Oxid Med Cell Longev. 2019;2019:6239058.
Leal-Junior ECP et al. Photobiomodulation therapy accelerates tendon and ligament recovery and improves joint stability. Lasers Med Sci. 2015;30(2):925–939.
Ailioaie LM et al. Low-level laser therapy in chronic inflammatory and pain syndromes: systematic review. Photomed Laser Surg. 2019;37(8):415–426.
Barolet D et al. Photobiomodulation: mechanisms of tissue regeneration relevant to joint rehabilitation. J Clin Med. 2020;9(6):1724.
De Marchi T et al. Low-level laser therapy reduces pain and improves function in knee osteoarthritis: randomized controlled trial. Clin Rehabil. 2018;32(3):355–364.
Erchonia Corporation. Technical specifications and FDA therapeutic laser clearances. 2023.