Light-emitting diode therapy

Light-emitting Diode Therapy

Blue light acne phototherapy

Light-emitting diode therapy (LED therapy) is a non-invasive treatment that uses specific wavelengths of light to penetrate the skin and promote various therapeutic benefits. This form of phototherapy is used in dermatology to treat a variety of skin conditions, including acne, rosacea, and actinic keratosis.

Mechanism of Action

LED therapy works by emitting light in specific wavelengths that penetrate the skin at different depths. The light energy is absorbed by the skin cells, which can stimulate cellular activity and promote healing. Different wavelengths correspond to different colors of light, each having unique effects on the skin.

The skin cross-section showing dermal penetration by different wavelengths of light

Blue Light

Blue light, typically in the range of 405-420 nm, is primarily used to treat acne. It works by targeting the bacteria Propionibacterium acnes, which is a major contributor to acne formation. The blue light penetrates the skin and produces reactive oxygen species that kill the bacteria.

Red Light

Red light, in the range of 620-750 nm, penetrates deeper into the skin and is used for its anti-inflammatory properties. It can help reduce redness and swelling, making it beneficial for conditions like rosacea and for promoting wound healing.

Near-Infrared Light

Near-infrared light, with wavelengths above 750 nm, penetrates the deepest and is used to promote circulation and stimulate collagen production, which can improve skin elasticity and reduce the appearance of fine lines and wrinkles.

Applications

LED therapy is used in various dermatological treatments:

Acne

Rosacea

Blue light therapy is effective in reducing acne lesions by targeting the bacteria responsible for acne. It is often used in combination with other treatments such as topical medications.

Rosacea

Red light therapy can help reduce the redness and inflammation associated with rosacea, providing relief from symptoms and improving skin appearance.

Actinic Keratosis

Actinic keratosis on the lip

LED therapy can be used to treat actinic keratosis, a precancerous condition caused by sun damage. The light helps to destroy abnormal cells and promote the growth of healthy skin.

Safety and Side Effects

LED therapy is generally considered safe with minimal side effects. Some individuals may experience temporary redness or irritation following treatment. Unlike ultraviolet light, LED light does not cause DNA damage or increase the risk of skin cancer.

DNA UV mutation

Related Pages

• Phototherapy
• Acne
• Rosacea
• Actinic keratosis
• Dermatology