Red Light Therapy for Skin Cancer: What the Evidence Actually Shows

TL;DR

• Red light therapy does not treat skin cancer. Home red light therapy devices have no role in the diagnosis, treatment, or management of skin cancer and should never be used as a substitute for medical care.
• The clinical procedure that uses red light for certain skin cancers is Photodynamic Therapy (PDT), a medical treatment combining a prescription photosensitising cream with a specialised red LED light source, administered by a doctor or dermatologist.
• PDT is approved for treating superficial basal cell carcinoma, Bowen's disease (SCC in situ), and actinic keratoses - but only in appropriate clinical settings after correct diagnosis.
• Where home red and near-infrared light therapy has a legitimate role is in general skin health, collagen repair, inflammation support, and skin recovery after clinical treatments - not in treating the cancer itself.
• Any skin lesion that is new, changing, bleeding, crusting, or otherwise concerning should be assessed by a GP, dermatologist, or skin cancer clinic without delay.

Australia has one of the highest rates of skin cancer in the world. With that comes a great deal of public interest in light-based treatments, which can create genuine confusion about what red light therapy can and cannot do for skin cancer. This article addresses that directly.

Home red light therapy devices do not treat skin cancer. The clinical use of red light in skin cancer management is a specific medical procedure called Photodynamic Therapy, which requires a prescription photosensitising cream and a medical-grade light source, administered by a qualified clinician after proper diagnosis. These are entirely different things, and the distinction matters significantly for anyone dealing with a skin cancer diagnosis or concern.

Types of Skin Cancer in Australia

There are three main types of skin cancer in Australia, with very different prognoses and treatment approaches:

• Basal cell carcinoma (BCC): The most common skin cancer, arising from basal cells in the outer layer of skin. BCCs rarely spread to other parts of the body but can cause significant local tissue damage if untreated. They typically appear as pearly or shiny bumps, flat scar-like lesions, or pink growths on sun-exposed areas.
• Squamous cell carcinoma (SCC): The second most common, arising from squamous cells. SCCs can spread to lymph nodes and other organs, particularly in immunocompromised individuals or when lesions are large or on high-risk sites such as the lips, ears, or scalp. They often appear as firm, rough, or scaly red patches, raised growths, or open sores.
• Melanoma: The most dangerous type, arising from melanocytes (pigment-producing cells). Melanoma can spread rapidly and requires surgical excision, often with additional treatment. Melanoma is not suitable for PDT or any light-based treatment.

Actinic keratoses (sunspots or solar keratoses) are precancerous rather than cancerous, but because they can progress to SCC, they are typically treated once identified. PDT is one of the established treatments for AKs.

What Is Photodynamic Therapy and How Does It Use Red Light?

Photodynamic Therapy is an approved medical treatment for certain superficial skin cancers and precancerous lesions. It is not a home therapy - it is a clinical procedure performed by a doctor or dermatologist using prescription products and medical equipment.

The procedure works as follows:

• A prescription photosensitising cream (such as Metvix or Ameluz) is applied to the diagnosed lesion by the treating clinician and left to absorb for one to three hours. The cream is taken up preferentially by abnormal, metabolically active cells.
• A specialised red LED device delivers red light at approximately 630nm for around 8 to 15 minutes, activating the photosensitiser inside the abnormal cells.
• The activated photosensitiser produces reactive oxygen species that destroy the abnormal cells while largely sparing surrounding healthy skin.

PDT is particularly suited to superficial BCCs, Bowen's disease (SCC in situ), and actinic keratoses across wide treatment areas. It is not used for melanoma, nodular or infiltrating BCCs, invasive SCCs, or any skin cancer that has spread beyond the surface layer. The treating clinician determines suitability based on lesion type, depth, location, and patient factors.

After PDT, treated skin is red, swollen, and sore for several days. Strict sun avoidance is required for at least 48 hours due to photosensitivity. Healing typically takes one to two weeks. PDT is available at skin cancer clinics, dermatology practices, and some general practices across Australia, and is recognised by the Cancer Council Australia as an established treatment for eligible conditions.

Why Home Red Light Therapy Devices Cannot Treat Skin Cancer

Home red light therapy devices cannot treat skin cancer, and attempting to use them for that purpose could cause serious harm through delayed treatment. The reasons are clear:

• Red light alone does not destroy cancer cells. The cell-destructive mechanism in PDT comes entirely from the photosensitiser reacting with light, not from the light itself. Without the prescription cream, red light at any power level has no mechanism to target or destroy skin cancer cells.
• Skin cancer requires diagnosis before treatment. BCC, SCC, and melanoma require accurate identification by a trained clinician, often including dermoscopy or biopsy. Treating an undiagnosed or misidentified lesion with any device risks missing a cancer that needs proper management.
• Many skin cancers are not suitable for light-based treatment at all. Melanoma, invasive SCC, and deeper BCCs require surgery, immunotherapy, or other medical treatment. Using a home device instead of or alongside appropriate care delays treatment that can be life-saving.
• The photosensitising cream is prescription-only and requires controlled clinical conditions. Its use outside a medical setting is unsafe.

Where Red and Near-Infrared Light Therapy Has a Legitimate Role in Skin Health

While home devices have no role in treating skin cancer, red and near-infrared light therapy has well-documented general skin health benefits that are relevant for people with chronically sun-damaged skin or those maintaining skin health after cancer treatment.

Collagen and Skin Repair

Red light at 630 to 660nm stimulates fibroblast activity and collagen synthesis in the dermis. Multiple RCTs support these effects in photodamaged skin, including improved texture, tone, and reduced fine lines. For people with extensive UV damage, supporting dermal repair is a reasonable part of a broader skin health routine alongside medical management.

Inflammation Reduction

Near-infrared light at 810 to 850nm reduces pro-inflammatory cytokines and prostaglandin E2 in skin tissue. Chronic UV damage creates a sustained inflammatory environment in skin. Reducing this inflammatory burden supports general skin health, though its specific role in skin cancer prevention has not been established in clinical trials.

Post-Treatment Skin Recovery

After PDT, surgical excision, or other skin cancer treatments, the treated skin undergoes a recovery period involving inflammation and wound healing. Photobiomodulation has demonstrated effects on accelerating wound healing and reducing inflammation in multiple clinical contexts. The application to post-skin cancer treatment recovery is mechanistically plausible and is an area of clinical interest, but should always be discussed with the treating clinician before use, and never applied to unhealed surgical sites without medical clearance.

What to Do If You Are Concerned About Skin Cancer

• Get a skin check. Any lesion that is new, growing, changing colour, bleeding, crusting, or not healing should be assessed by a GP, dermatologist, or skin cancer clinic without delay. In Australia, dedicated skin cancer clinics offer thorough skin checks with dermoscopy.
• Do not self-treat. Do not attempt to treat a suspicious lesion with any home device, natural product, or over-the-counter preparation. This includes red light therapy devices, which have no role in skin cancer treatment.
• Follow your clinician's treatment plan. BCC, SCC, and melanoma all have established, effective treatment pathways. Outcomes are significantly better with early detection and appropriate treatment.
• Sun protection remains essential after any skin cancer diagnosis or treatment, as people with a history of skin cancer are at higher risk of further lesions. Daily SPF50+ sunscreen, protective clothing, and UV avoidance during peak hours are non-negotiable.
• Regular skin checks after treatment are important for early detection of new or recurrent lesions.

StreamShop Devices for Skin Health Support

The devices below are not treatments for skin cancer or precancerous skin lesions. They are red and near-infrared light therapy devices with evidence-backed benefits for skin collagen, repair, and inflammation reduction, used as part of a general skin health routine alongside appropriate medical care.

LED Light Therapy Dome With 1064nm ($399.99)

StreamShop's LED light therapy dome with 1064nm delivers 660nm, 850nm, and 1064nm across 240 triple-chip LEDs at 87.4 mW/cm2. The hands-free arch format positions over the face and head for whole-face coverage in a single reclining session. The face, scalp, and neck are the most common sites of sun-related skin damage in Australians. For people maintaining facial skin health as part of a broader sun damage management routine, the dome provides convenient full-coverage sessions without requiring the user to hold a device.

SS100 Red Light Panel With 1060nm ($749.99)

StreamShop's SS100 red light panel with 1060nm delivers nine wavelengths including 660nm, 810nm, 830nm, 850nm, and 1060nm at 160 mW/cm2 or above through 72 dual-chip LEDs with a 30-degree focusing lens. As an ARTG-listed class IIa medical grade device, the SS100 carries the highest regulatory classification of any StreamShop panel. It is suited to targeted skin health support across commonly sun-damaged areas including the face, neck, chest, forearms, and hands. Per-wavelength dimming allows red or near-infrared sessions depending on the specific skin health goal.

SS200 Red Light Panel With 1060nm ($1,199.99)

StreamShop's SS200 red light panel with 1060nm delivers the same nine-wavelength configuration as the SS100 across a larger treatment surface. The SS200 is particularly practical for people managing skin health across wide surface areas such as the chest, back, and shoulders - areas where cumulative UV damage and skin lesions are common in Australians with high lifetime sun exposure. The larger panel means less repositioning to cover these broad areas in a single session.

Frequently Asked Questions

Can Red Light Therapy Cure Skin Cancer?

No. Home red light therapy devices cannot treat or cure skin cancer. The clinical procedure that uses red light for certain superficial skin cancers (PDT) requires a prescription photosensitising cream and must be performed by a qualified clinician. Any skin lesion of concern must be assessed and treated by a medical professional.

What Types of Skin Cancer Can PDT Treat?

PDT is suitable for superficial basal cell carcinoma, Bowen's disease (SCC in situ), and actinic keratoses in appropriate presentations. It is not suitable for melanoma, nodular or invasive BCCs, invasive SCCs, or any skin cancer that has spread beyond the surface. Suitability is determined by the treating clinician after diagnosis.

Is Red Light Therapy Safe If I Have Had Skin Cancer?

For general skin health use (collagen support, inflammation reduction), red and near-infrared light therapy at the wavelengths and power levels used in home devices is generally considered safe. However, it should not be applied to active lesions, unhealed surgical sites, or areas currently undergoing treatment without clearance from the treating clinician. If you have had skin cancer, discuss any complementary therapies with your doctor.

Can I Use a Red Light Device After PDT?

Not without medical clearance, particularly in relation to the photosensitivity period after treatment. There is interest in red and near-infrared light supporting post-PDT skin recovery, but timing and site selection matter. Always discuss with your treating clinician before applying any device to skin that has recently undergone PDT.

What Are the Warning Signs of Skin Cancer?

Warning signs include any spot that is new or changing in size, shape, or colour; any lesion that bleeds, crusts, or does not heal; a shiny or pearly bump; a flat scar-like lesion; or any dark spot with irregular borders or multiple colours. The ABCDE rule (Asymmetry, Border, Colour, Diameter, Evolving) applies particularly to melanoma. Any concerning lesion should be assessed by a clinician without delay.