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Fast, Gentle Relief from Painful Cold Sores

What Is a Cold Sore?

A cold sore is a small blister that forms around the lips or mouth. It’s caused by the herpes simplex virus (usually HSV-1). Cold sores are contagious, can return over time, and often begin with a burning or tingling feeling before becoming visible.

What Triggers Cold Sores?

Cold sores don’t just appear out of nowhere, they’re usually triggered by something that activates the virus in your body. If you’ve had a cold sore before, certain situations may cause it to come back.

Common triggers include:

  • Stress or emotional strain: High stress levels can weaken your immune system and lead to flare-ups.
  • Fatigue or lack of sleep: When your body is tired, it has a harder time fighting off infections.
  • Illness or fever: Colds, the flu, or any other sickness can trigger a cold sore, hence the name "cold sore."
  • Sun exposure: Too much sun can irritate your lips and skin, making it easier for a sore to form.
  • Hormonal changes: Menstruation or hormonal shifts may lead to outbreaks in some people.
  • Dental visits or lip injuries: Even minor trauma near the mouth can activate the virus.
Understanding your personal triggers can help you prevent future outbreaks or treat them early before they get worse.

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