Supporting colds, inflammation, and respiratory discomfort in the darker season
The long, cold winter months don’t only test our mood—they also challenge our immune system. Less sunlight, cold air, and more time spent indoors can all contribute to recurring colds, lingering inflammation, and respiratory issues such as sinusitis or bronchial irritation. During this period, any method that supports the body’s recovery processes in a natural way becomes especially valuable. This is where red light can fit in as well.
Light that doesn’t just shine—it helps the body get to work
Using red and near-infrared light—also known as photobiomodulation—is based on the idea that certain wavelengths can directly influence cellular energy. Visible red light primarily affects more superficial tissues, while near-infrared light penetrates deeper and can reach muscles, connective tissue, and neural structures as well. Together, they can be particularly helpful when the goal is to calm inflammatory processes and support tissue recovery.
Dr. Paul Anderson, an integrative physician and researcher, describes the process—based on more than three decades of clinical experience—as if the cells’ “internal environment” receives a fresh boost. Light exposure can increase mitochondrial activity, raise energy production, and at the same time reduce oxidative burden. This dual effect—more energy, fewer inflammatory by-products—creates an ideal environment for healing.
Colds and general inflammation: when the body is overloaded
Even a simple cold pushes the immune system into a higher gear. Inflammation is a natural response, but when it lingers it can leave fatigue, muscle aches, and an overall heavy feeling behind. In this phase, red light isn’t about suppressing immune response—it aims to make recovery more efficient. Inflamed cells tend to hold on to metabolic waste. Red light may support nutrient uptake and the removal of “metabolic debris” (substances produced during inflammation). Better cellular energy availability can also help immune cells work faster and in a more coordinated way, while the tissues experience less “inflammatory noise.”
Many people report that with light use, cold symptoms feel less drawn out and recovery time seems shorter—especially when paired with proper hydration and rest.
Sinus and nasal issues: targeted support
Sinusitis is a classic winter annoyance. Swollen mucosa, trapped mucus, and an inflamed environment reinforce one another. When applied locally, red and near-infrared light may help by improving microcirculation, reducing tissue edema, and supporting the clearance of inflammatory by-products. Light applied to the nasal area is especially interesting because the mucosa has a dense network of blood vessels and nerves, which can respond quickly to changes in cellular energy. This may explain why some people report easier breathing and reduced pressure after relatively short sessions.
Bronchi and lungs: reaching deeper layers
One characteristic of near-infrared light is its deeper penetration, which can be relevant when working with the chest area. In Dr. Anderson’s clinical experience, panels illuminating the chest may provide supportive benefits in inflammatory states of the bronchi and lungs—whether it’s a lingering cough, irritation, or the after-effects of respiratory infections.
The goal here is not to “switch off” a single symptom, but to optimize the tissue environment: better oxygen delivery, more efficient cellular function, and a more organized immune response.
The role of the warming effect in winter
One often underestimated benefit is the pleasant, deep sense of warmth—typically associated with near-infrared wavelengths. This isn’t only about comfort; it can be physiologically relevant. As tissues warm up, blood vessels dilate and circulation increases, which on its own can support recovery. In colder months, when muscles and connective tissues are more prone to stiffness, this effect can be especially valuable.
The bigger picture: when the body gets the right conditions
Using red light in winter doesn’t focus on just one problem—it helps create a more favorable internal environment. One where cells can access energy more easily, inflammatory processes become more regulated, and the body can return to its natural recovery rhythm. For colds, sinus discomfort, or airway irritation, this kind of support can be particularly timely—especially when we get the least natural sunlight. To explain the idea, Dr. Anderson uses a vivid analogy: the cell is like an apartment where inflammation has caused garbage to pile up. Red light “opens the windows,” letting fresh oxygen and energy in, which helps carry waste out of the house. “Water” (hydration) is also needed to help flush the system.
Of course, it’s best used as a complementary approach alongside standard medical care—and only when the body is not actively dealing with fever. It’s also important to emphasize that red light does not replace medical diagnosis or treatment. Instead, it’s a supportive approach that makes the most sense together with appropriate lifestyle choices, rest, and collaboration with a healthcare professional. The goal isn’t a quick fix, but supporting the body’s natural function—especially when it needs it most.
Sources and references:
Photobiomodulation therapy for major depressive disorder – Systematic Review and Meta-Analysis (2023)
https://pmc.ncbi.nlm.nih.gov/articles/PMC10484593/
Anti-inflammatory effects of photobiomodulation
Hamblin MR., AIMS Biophysics
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5523874/
Photobiomodulation for lung inflammation and COVID-19
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7388148/
Near-infrared light reduces inflammatory cytokines
https://pubmed.ncbi.nlm.nih.gov/26888259/
Photobiomodulation in respiratory diseases – Review
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8977938/
Intranasal Photobiomodulation Therapy – Review
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8211130/
Effects of red and near-infrared light on sinus inflammation
https://pubmed.ncbi.nlm.nih.gov/24677707/
Dr. Paul Anderson – Photobiomodulation & Inflammation (video)
https://www.youtube.com/watch?v=9uB8X5KZf6M
Dr. Michael Hamblin (Harvard Medical School) – Photobiomodulation education
https://www.photobiomodulation.com/
Red Light Therapy – Healthline
https://www.healthline.com/health/red-light-therapy
Red Light Therapy for Sinus Inflammation – Verywell Health
https://www.verywellhealth.com/red-light-therapy-5216594
Red Light Therapy – Cleveland Clinic
https://health.clevelandclinic.org/red-light-therapy/
