Red light nasal therapy is a treatment that may provide short-term relief for allergic rhinitis, but the evidence is mixed and the benefits appear modest. It should not replace established treatments such as intranasal corticosteroid sprays. There is not enough reliable evidence to recommend it for colds or chronic sinusitis.
Red light nasal therapy is also called intranasal photobiomodulation, low-level laser therapy, or red light rhinophototherapy. It uses a small LED or laser probe inside the nose. Devices may emit red light at about 660 nanometres or use longer near-infrared wavelengths.
A 2025 review of six studies involving 162 patients found that results for chronic rhinosinusitis varied widely. Most studies also used different devices, wavelengths and treatment schedules, so findings from one device may not apply to another.
At a Glance
| Intended use | Does it work? | Evidence-based view |
|---|---|---|
| Allergic rhinitis | Possibly | Some studies report symptom relief, but results are inconsistent and placebo-controlled evidence is limited. |
| Nasal congestion | Sometimes temporarily | A person may feel less congested, but tests of nasal airflow do not show reliable improvement. |
| Chronic sinusitis | Not established | Research is limited and uses different devices and treatment protocols. |
| Common cold | No convincing evidence | Red light nasal therapy has not been shown to reliably shorten or treat a cold. |
| Replacing allergy medication | No | Current guidelines support intranasal corticosteroids and antihistamines, not red light therapy, as standard treatment. |
How Effective Is Red Light Therapy for Allergic Rhinitis?
Red light nasal therapy may improve sneezing, runny nose, itching and congestion in some people with allergic rhinitis, but it has not been shown consistently to work better than placebo.
A small randomized study using 660-nanometre red light reported symptom improvement in 72% of treated patients, compared with 24% of those who received sham treatment. The study was relatively small and used a specific clinical device and treatment schedule. Those results may not apply to consumer products.
Another study found that one red-light treatment improved reported symptoms after 30 minutes. It did not produce a meaningful improvement in nasal resistance or other tests of nasal patency. Symptoms, particularly sneezing, also worsened again over the next two days.
A systematic review and meta-analysis found symptom improvement after low-level laser therapy, but the studies differed substantially in their methods and showed signs of publication bias. When the treatment was compared directly with placebo, the improvement was not statistically significant.
What This Means in Practice
Red light nasal therapy might give some people short-term relief from allergy symptoms. The research does not show that an inexpensive nasal LED device bought online will produce the same results as the device and treatment schedule used in a clinical study.
Is Red Light Therapy the Same as Rhinolight Phototherapy?
No. Red light nasal therapy and Rhinolight-style phototherapy are different treatments.
Some rhinophototherapy studies used a combination of ultraviolet-A, ultraviolet-B and visible light. Other studies used red light alone, often at about 660 nanometres. The treatments differ in wavelength, intensity, dose, exposure time and safety considerations.
Results from a device that uses ultraviolet and visible light should not automatically be applied to a red or near-infrared consumer device.
This distinction matters because product advertisements may use the broad term "nasal phototherapy" even when the device has a different light source and treatment protocol from the devices tested in clinical studies.
Does It Work for Chronic Sinusitis?
The evidence for chronic sinusitis is too limited to support red light nasal therapy as a standard treatment.
A 2017 double-blind, placebo-controlled trial of intranasal phototherapy for chronic rhinosinusitis found no significant improvement in symptoms, nasal airflow, smell or other measured outcomes compared with placebo. The study used mixed visible and ultraviolet light rather than red light alone.
A 2025 systematic review included six studies involving 162 patients and found improvements in reported chronic rhinosinusitis symptoms after low-level laser or photobiomodulation therapy. It did not find a clear improvement in CT-based measures, and results varied between studies. The authors said larger trials with consistent treatment protocols are needed.
Current sinusitis guidance recommends saline nasal irrigation, topical intranasal corticosteroids, or both for symptom relief. Red light therapy is not an established substitute.
Does It Help a Cold?
There is no good evidence that red light nasal therapy treats the common cold, kills cold viruses or reliably shortens cold symptoms.
Research on nasal heating and other forms of "rhinotherapy" should not be confused with red light photobiomodulation. A randomized trial of heated, humidified nasal airflow found no reduction in cold severity or duration compared with sham treatment. That study did not test red light directly, but it shows why a proposed treatment mechanism is not enough to establish a clinical benefit.
For a cold, red light nasal therapy is an unproven option for symptom relief, not an antiviral treatment.
How Does Red Light Nasal Therapy Supposedly Work?
Researchers propose that red or near-infrared light may affect inflammatory signaling, cellular energy production and immune-cell activity in the nasal lining. In allergic rhinitis, the proposed effects include reducing inflammation and the release of allergy-related mediators.
These mechanisms are biologically plausible, but they do not prove that a consumer device improves symptoms. Results depend on the wavelength, power, dose, treatment duration and condition being treated.
What Are the Risks?
Short-term studies generally report few serious adverse events. Reported side effects include:
- Nasal dryness
- Burning or irritation
- Nosebleeds
- Nasal pain
- Headache
- Temporary discomfort around the nostrils
Long-term safety is less certain because studies are small and treatment protocols vary. Do not place ordinary red-light bulbs, lasers or facial devices inside the nose. Use only a device designed for intranasal use, and follow the instructions.
Speak with a clinician before using an intranasal device if you have recurrent nosebleeds, nasal polyps, recent nasal surgery, unexplained one-sided blockage or persistent sinus symptoms.
Should You Buy a Red Light Nasal Therapy Device?
Red light nasal therapy is reasonable to consider only as an optional add-on for allergic rhinitis, not as a replacement for established treatment.
A device may be worth considering if:
- Your symptoms are consistent with allergic rhinitis.
- You have already tried standard treatments correctly.
- You understand that any improvement may be temporary.
- The manufacturer provides the exact wavelength, power output, treatment time and intended nasal use.
- You are not relying on claims about immunity, infection or "detoxification."
The ARIA-EAACI guidelines recommend intranasal corticosteroids over no treatment and support intranasal antihistamine-corticosteroid combinations when symptoms are harder to control. They do not list red light therapy as a comparable standard option.
Bottom Line
Red light nasal therapy may help some people with allergic rhinitis, but it has not been shown consistently to work better than placebo. Evidence for chronic sinusitis remains limited, and evidence for treating colds is lacking.
If allergies are causing the symptoms, start with an evidence-based option such as an intranasal corticosteroid or antihistamine recommended by a healthcare professional. Treat red light nasal therapy as an optional add-on, use a purpose-built device and keep expectations modest.