Red Light Therapy for Cold Sores: How It Helps

Cold sores (oral herpes) are stubborn, but light therapy is one of the more promising at-home tools for shortening an outbreak and easing discomfort.

How light may help

Red and near-infrared light are anti-inflammatory and support tissue healing, while blue light has antibacterial properties. Used at the first tingle, before the blister fully forms, light therapy may reduce the severity and speed up healing of the sore. Acting early is the key.

How to use a torch

At the first sign of tingling, treat the spot for a few minutes several times a day following the device instructions. A handheld 3-in-1 torch with red, near-infrared, and blue modes is purpose-built for this and is small enough to keep in a bag for travel.

What it will not do

Light therapy does not cure the underlying virus; it helps manage individual outbreaks. Severe or frequent outbreaks should be discussed with your doctor. See our safety guide.

A 3-in-1 torch with red, near-infrared, and blue light is made for cold sores and lips. The AWA Red Light Therapy Torch ($84.99, FSA/HSA eligible) is a great fit. See how to use your FSA/HSA to save with pre-tax dollars.

FAQ

When should I start treatment?

At the very first tingle, before the blister forms, for the best chance of shortening the outbreak.

Does it cure cold sores?

No. It helps manage individual outbreaks but does not eliminate the underlying virus.

This article is educational and not medical advice. Red light therapy is generally very safe, but check with your doctor about your specific situation.