Cold sores
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Cold sores: Condition overview
Help control, relieve and prevent cold sore outbreaks

Consumer Reports Health explains the best and most up-to-date expert research and evidence about treating cold sores. Our clear and sound advice helps you and your doctor choose your best treatment options.

Key points for people with cold sores
  • Cold sores are blisters that appear on your lips and around your mouth.
  • Some people get warning symptoms about two days before their blisters appear.
  • You may have an itching, burning or tingling feeling on your lips.
  • When you first get infected with the virus that causes cold sores, you may or may not get symptoms.
  • But children may experience a serious illness when they get infected with the virus.
  • You can pass the virus on to other people through your saliva, especially when you have an outbreak.
  • You should avoid kissing when you have cold sores and be careful not to share cups, cutlery or towels. You should also avoid oral sex during an outbreak.
Once you're infected with the virus that causes cold sores, the virus stays in the nerves in your face. There are certain things that seem to trigger new cold sores including throat infections, fatigue and stress. Cold sores usually come back, but there are treatments available to control, relieve, and prevent cold sore outbreaks.

Our concise condition report and Treatment Ratings table will help you and your doctor decide which treatment for cold sores is right for you. As a Consumer Reports Health subscriber, we'll also help you sort through the best research and the most effective treatments for over 100 conditions and illnesses that may affect you and your family.