Cold sores are small, painful blisters usually caused by the herpes simplex virus (HSV-1). They often appear around the lips and can be triggered by stress, illness, or sun exposure. Red light therapy (RLT) is a gentle and natural way to help speed up healing and reduce outbreaks.
How Red Light Therapy Helps Cold Sores
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Speeds up healing
Red light boosts cell repair and regeneration, helping the sore go away faster. -
Reduces pain and swelling
It can soothe the affected area by lowering inflammation. -
May prevent future outbreaks
Regular use might strengthen the skin’s barrier and reduce viral activity.
Best Type of Red Light for Cold Sores
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Use light in the 630–660nm range for surface-level skin issues.
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Some devices are made specifically for lip therapy or spot treatment.
How to Use It
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Start using RLT as soon as you feel tingling—before the blister appears is best.
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Hold the device close to the sore for 1–3 minutes, 1–2 times a day.
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Keep using it until the sore is fully healed.
Tips
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Don’t share your device with others to avoid spreading the virus.
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Be consistent with treatment for the best results.
Conclusion
Red light therapy is a safe and effective way to reduce the discomfort and duration of cold sores. With regular use, it may even help prevent future flare-ups.