MLS Laser Therapy for Foot and Ankle Pain: What the Evidence Actually Says

If you've been dealing with stubborn heel pain, an aching Achilles, or nerve discomfort that hasn't budged with rest and over-the-counter measures, you may have come across laser therapy as an option. MLS laser therapy is one of the more talked-about non-surgical tools in foot and ankle care, and for good reason. But it helps to separate the marketing from the medicine, so here's a straightforward look at what it is, how it works, and what the research supports.

What is MLS laser therapy?

MLS stands for Multiwave Locked System, a form of low-level (sometimes called "cold") laser therapy. It's a non-invasive treatment, meaning no incisions, no needles, and no downtime. A handheld device delivers specific wavelengths of light into the tissue, where the energy is absorbed by your cells and used to support the body's own repair processes.

This broader category is known in the research literature as low-level laser therapy (LLLT) or photobiomodulation therapy (PBMT), and it has been studied in physical medicine since the late 1960s.

How it's thought to work

At the cellular level, the light energy is absorbed by structures in the cell and stimulates increased production of ATP, the molecule cells use for energy. The proposed effects include:

• Reduced inflammation by improving local circulation and lymphatic drainage, which helps move fluid and metabolic waste away from the injured area
• Pain modulation by influencing how nerves transmit pain signals
• Tissue repair support by encouraging cellular activity in tendons, ligaments, and other soft tissue

It's important to be honest here: the exact biological mechanisms are still an area of active research, and not every claimed benefit is settled science. What matters more for you as a patient is what the controlled clinical studies actually show.

What the research says

The strongest evidence for laser therapy in the foot is in plantar fasciitis, the most common cause of heel pain.

A 2019 systematic review and meta-analysis pooling six randomized controlled trials found that, compared with a control group, patients receiving low-level laser therapy had a significant reduction in pain on the visual analogue scale by the end of treatment, and that this improvement continued for up to 3 months. The same analysis noted a more mixed picture on one functional measure (the Foot Function Index pain subscale), so the benefit was clearest for pain relief.

A larger 2022 systematic review and meta-analysis published in BMJ Open, looking at LLLT across lower-extremity tendinopathy and plantar fasciitis, rated the included studies as moderate to high in quality, which is a meaningful endorsement in a field where many treatments rest on weaker evidence.

For nerve-related conditions, arthritis, and various tendinopathies, the evidence is more preliminary. Many practices use laser therapy successfully for these as part of a broader plan, but you should view it as a reasonable adjunct rather than a guaranteed fix, and your podiatrist should be candid with you about that distinction.

What conditions it's commonly used for

In a podiatry setting, MLS laser therapy is frequently applied to:

• Plantar fasciitis and chronic heel pain
• Achilles tendinopathy and other tendon irritation
• Soft-tissue sprains and strains
• Nerve-related discomfort, including some neuropathy symptoms
• Inflammation associated with arthritis in the foot and ankle joints

It's worth noting that laser therapy reduces pain and inflammation; it does not reverse structural joint damage. Set expectations accordingly.

What to expect from treatment

Sessions are short and painless. Most patients feel little more than a gentle warmth, and you can return to normal activity right away. Because it works by stimulating a healing response over time, laser therapy is typically delivered as a series of sessions rather than a single visit, and it's often combined with other measures like stretching, appropriate footwear, orthotics, or physical therapy for the best results.

Is it right for you?

Laser therapy is a low-risk, drug-free option that's especially worth considering if you'd like to avoid or delay injections or surgery, or if conventional measures haven't given you lasting relief. The honest answer to "will it work for me?" depends on your specific diagnosis, how long you've had the problem, and what else is going on. A proper exam is the only way to know.

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Talk to a foot and ankle specialist

Dr. Kayla Wright, DPM, evaluates each patient individually and will tell you honestly whether laser therapy, or another approach, is the right fit for your condition. If heel pain, tendon trouble, or nerve discomfort is keeping you off your feet, learn more and get in touch at drkaylawright.com.

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This article is for general educational purposes and is not a substitute for individualized medical advice. Please consult a qualified provider about your specific situation.

Sources

1. Wang W, Jiang W, Tang C, Zhang X, Xiang J. Clinical efficacy of low-level laser therapy in plantar fasciitis: A systematic review and meta-analysis. Medicine (Baltimore). 2019;98(3):e14088. https://pubmed.ncbi.nlm.nih.gov/30653125/
2. Naterstad IF, Joensen J, Bjordal JM, et al. Efficacy of low-level laser therapy in patients with lower extremity tendinopathy or plantar fasciitis: systematic review and meta-analysis of randomised controlled trials. BMJ Open. 2022;12(9):e059479. https://pmc.ncbi.nlm.nih.gov/articles/PMC9528593/
3. Basford JR, Malanga GA, Krause DA, Harmsen WS. A randomized controlled evaluation of low-intensity laser therapy: plantar fasciitis. Arch Phys Med Rehabil. https://pubmed.ncbi.nlm.nih.gov/9523774/