An Introduction to Low Level Laser Therapy in Pain Management
Dr. Robert Sullivan (IRL)
Surgical Podiatrician, Midleton Foot & Laser Clinic
Robert Sullivan is a progressive Podiatry Clinician who holds a BSc(Hons) Podiatry, MSc Podiatric Surgery (Edinburgh) and post graduate Certificates in POMS (prescription only medicines), local anaesthesia, Homeotoxicology and Myofascial Acupuncture. Over the last 15 years he has lectured at Continued Professional Development events and various universities in Ireland, UK and Europe. Robert has published papers in a number of podiatry journals. His special Interests are podiatric surgery, low level laser therapy, rheumatology and biomechanics.
This talk introduces Low Level Laser Therapy (LLLT) in pain management
Our body has pretty much everything in it that we need to fix ourselves. It is just that we have forgotten how that works. Sometimes what the laser actually does is it helps the cells to remember.
Summary
- Low level laser therapy uses monochromatic, collimated light to stimulate cells without heat. This safe process helps the body solve problems by triggering natural cellular responses. - Laser light targets cytochrome C in mitochondria to produce ATP and nitric oxide. This process triggers vasodilation and flushes toxins, promoting cellular metabolism and tissue repair. - Effective pain management requires targeting the nerve root and corresponding dermatomes. Addressing the neural root before the local pain site is essential for a successful outcome. - Combining laser therapy with physical activation, including movement and resistance, helps restore the range of motion and accelerates recovery for both acute and chronic pain conditions. - Laser applications extend to systemic relief for migraines and rheumatoid arthritis by stimulating the body’s innate healing mechanisms to restore chemical and hormonal balance.
Article
Light, Nerves, And The New Language Of Pain
At Biohacker Summit 2017 Stockholm, Dr. Robert Sullivan Presented Low Level Laser Therapy Not As Futurism, But As A Practical, Provocative Tool For Pain Management
There was a touch of showmanship to Dr. Robert Sullivan’s presentation, **“An Introduction To Low Level Laser Therapy In Pain Management,”** at **Biohacker Summit 2017 Stockholm** on **19 May 2017** in **Stockholm, Sweden**. But beneath the wit, the Irish surgical podiatrician offered something more consequential: a case for treating pain not simply where it hurts, but where the nervous system begins to speak.
Sullivan, of Midleton Foot & Laser Clinic, did not open with a dense slide of data or a thicket of terminology. He opened with science fiction. “A lot of the time when we look at science fiction, it actually becomes science fact,” he told the audience, invoking the fantasy of a handheld device that could be passed over the body and quiet pain without incision, injection or heat.
What followed was an argument for precisely that possibility, grounded in low level laser therapy, or LLLT, a non-invasive method that uses monochromatic, collimated light to trigger biological change without thermal damage.
A Demonstration Before The Theory
Sullivan chose to begin backwards. Rather than lecture first and prove later, he invited a volunteer with acute shoulder pain onto the stage. The pain had developed only hours earlier, after holding a camera, but that detail mattered. This was not a vague complaint or an old injury blurred by memory. It was immediate, localised and testable.
His method was strikingly simple. He did not begin by treating the painful shoulder itself. Instead, he targeted the relevant nerve root, the brachial plexus at the cervical spine, arguing that pain must be addressed at its neurological origin before it is addressed at its visible destination.
As the laser was applied, the volunteer was asked to move, then to work against resistance. Movement, Sullivan insisted, was not an afterthought. It was part of the therapy. By the end of the brief demonstration, the volunteer reported significant relief.
The point, for Sullivan, was not that a stage demonstration proved a field. It was that seeing the result clarified the principle. Pain, he suggested, is rarely best understood as an isolated patch of suffering. It is a message moving along a network.
“Pain is the body’s way of telling us that something is wrong,” he said. “Laser therapy allows us to target the root of that pain to help the body respond.”
What The Laser Was Supposed To Do
The science, as Sullivan presented it, revolved around photobiomodulation, the process by which light alters cellular behaviour. Low level laser therapy, he explained, uses light that is monochromatic, meaning a single wavelength, and collimated, meaning it travels in one coherent direction rather than scattering like ordinary room light.
Once inside the body, that light interacts with tissue and is absorbed by cellular structures, particularly **cytochrome C** in the mitochondria. From there, Sullivan traced a biochemical cascade: increased ATP production, release of nitric oxide, the generation of reactive oxygen species, vasodilation, improved cellular metabolism and the flushing of metabolic waste.
This was not, in his account, about heating tissue or burning pathology away. It was about nudging dormant or distressed biological systems back into function.
“Cold lasers especially are not going to do any harm,” Sullivan said. “It is either going to help you solve a problem or it isn’t going to do anything at all.”
That claim, bold in its simplicity, sat at the heart of his appeal. In a medical landscape crowded with aggressive interventions and side effects, the allure of a therapy framed as low risk and systemically supportive was obvious.
Treating The Nerve Before The Symptom
One of the most memorable parts of Sullivan’s talk was his insistence that clinicians must stop thinking only in terms of the sore spot. If a patient arrived with pain in the shoulder, calf, foot or face, the first question should not be where it hurt, but which nerve root and which dermatome governed that pain.
He returned repeatedly to this neurological map. The brachial plexus for upper-body pain. The sciatic plexus for much of the lower body. Dermatomes as the practical guide connecting skin, spinal segments and perception.
This, he argued, was the difference between superficial treatment and meaningful intervention. “When you’re treating somebody with the laser, you have to go to the nerve root,” he said. “If you don’t go to the nerve root, you’re wasting your time.”
The concept had implications beyond shoulder pain. Sullivan described applications in **plantar fasciitis**, **rheumatoid arthritis**, **migraines** and **diabetic peripheral neuropathy**, the latter an area where he said ongoing FDA-related research had shown promising signs of nerve regeneration.
The Body As A System, Not A Site
What made Sullivan’s presentation resonate beyond conventional pain talk was its holistic ambition. He described laser not as a local gadget for local discomfort, but as a tool capable of setting off wider physiological effects.
“Laser is a tool that treats your body from a total point of view,” he said. “This cascade effect goes through the entire body, making it a very holistic therapy.”
That language can often sound slippery in wellness circles, a way of replacing evidence with mood. Yet Sullivan’s framing was more mechanical than mystical. Nitric oxide alters blood flow. Reactive oxygen species contribute to signalling and tissue response. Neural targets influence broad regions of the body. Even when the treatment point is specific, the consequences may not be.
He described “spinal conditioning” approaches for rheumatoid arthritis, and spoke of laser use for migraine relief by targeting the prefrontal cortex, cerebellum and the circle of Willis. He also noted that repeated treatment might not merely interrupt symptoms, but help restore the body’s own regulatory habits.
In his formulation, laser acted almost as a tutor for damaged physiology. It reminded the body of processes it had forgotten how to perform.
Safety, Scepticism, And The Ethics Of Innovation
Sullivan was careful, if not cautious. He stressed the importance of history-taking, clinical judgment and the oldest rule in medicine. “Once you have good information and you are sure that you are not breaking the first rule of the Hippocratic oath, which is to do no harm, then you are safe to go.”
He noted common areas of concern, including pregnancy and epilepsy, even as he suggested that in his own practice some supposedly sensitive cases had posed no issue. The essential thing, he said, was not blind enthusiasm but informed discernment. Clinicians had to know when to treat and when to refer.
That tension, between possibility and proof, ran through the session. Sullivan acknowledged that much of the early evidence for laser therapy came from veterinary medicine, where biological response could be observed even when verbal feedback could not. He also pointed to emerging research into whether laser absorption and transmission might one day have diagnostic value.
Still, he did not pretend the field had settled every question. There were, by his own admission, “bucket loads” more science still to discuss.
From Performance Enhancement To Medical Unease
One of the more revealing moments came during discussion of healthy individuals and athletic performance. Could laser be used not merely to reduce pain, but to enhance movement and function in the uninjured?
Sullivan’s answer was conflicted. He accepted that such effects were plausible, even observable, but recoiled from their implications. As a doctor, he said, he was uneasy about using a therapeutic tool to help people gain an edge.
That concern was sharpened by an intervention from Christian, a Scandinavian distributor at the event, who noted that in show jumping laser treatment was effectively treated as doping, with horses requiring a 96-hour quarantine period after use. The therapy’s power, in other words, was already being acknowledged by systems designed to regulate competitive fairness.
Sullivan’s discomfort was telling. It suggested he saw low level laser therapy not as harmless wellness theatre, but as a technology potent enough to force ethical distinctions between healing and enhancement.
A Modest Device With Grand Implications
The enduring impression from Sullivan’s presentation at Biohacker Summit 2017 Stockholm was not of miracle cure evangelism, even if some of the claims invited scrutiny. It was of a clinician trying to shift the frame through which pain is understood.
Pain, in his telling, was not just an ache to be muted. It was a signal, a pattern, a conversation between tissue, nerve and brain. Low level laser therapy entered that conversation with light rather than force, aiming not to overpower the body but to provoke it into response.
For an audience accustomed to the language of optimisation, hacks and upgraded biology, Sullivan offered something more grounded. The future, he implied, might not lie in dominating the body with ever more invasive tools, but in learning how to speak more precisely to the systems already there.
And if the presentation occasionally sounded like science fiction catching up with itself, that was partly the point. As Sullivan reminded the room, yesterday’s fantasy had a habit of becoming today’s instrument.
Part of Biohacker Summit 2017 Stockholm