What should you know about purple LED light therapy?

The purple appearance usually comes from blue and red LEDs operating together; it is not necessarily a separate wavelength. Blue light is commonly used around acne-prone skin, while red light is used to support the skin’s repair response and calm visible irritation. A panel shines light over clean skin without cutting or peeling it. Results are gradual and depend on the device, treatment schedule, acne pattern, and whether blocked pores or inflamed pimples are present.

LED therapy is different from ultraviolet tanning light. A clinician should confirm the device and settings, especially if you take medicines that increase light sensitivity or have a condition affected by light.

Have a skin professional assess your acne before choosing a home or clinic device. Ask whether the panel is intended for facial pimples, how often it should be used, and how your eyes will be protected. Keep the skin clean, follow the device instructions, and stop if you develop marked burning, swelling, or a rash. Do not assume that a purple glow means stronger treatment.

You can read about [Acne](/conditions/acne/), [Pimples](/symptoms/pimples/), the [LED Phototherapy Panel](/technology/led-phototherapy-panel/), and [LED Light Therapy](/treatments/laser-and-energy/led-light-therapy/).

Arrange a dermatology review for painful deep lesions, spreading redness, scarring, sudden worsening, or acne that is affecting your confidence. Seek prompt help for eye pain or vision change after light exposure, facial swelling, blistering, or breathing difficulty. These symptoms need assessment rather than another LED session.

Ask which light colours and device are appropriate for your skin, whether your medicines increase light sensitivity, what improvement can reasonably be expected, and when another acne treatment would be more suitable.