Using Hydrogen Peroxide for Cold Sores

Cold sore famously know as fever blisters are caused by Herpes Simplex Virus (HSV). This is a contagious skin problem that affects the lips, neck, cheeks or the skin around the neck. However, more often these viruses affect the lips. The lips being one of the few key body organs that make someone look attractive you wouldn’t want these blisters filled with fluids to last more than a week. On the contrary, you would want it to heal as soon as possible. This brings us to our question: Can hydrogen peroxide cure cold sore?

These fever blisters being contagious, have to be treated in their earlier stages.  Basically, when you go to the hospital most doctor will prescribe anti-viral medicines or ornaments. I have good news, you don’t always have to visit your doctor when you get cold sores. You can use hydrogen peroxide to cure these annoying blister.

Hydrogen peroxide can be your typical home remedy for cold sores. As a precaution always use 3% concentration of hydrogen peroxide. Anything above this will be harmful to your skin.

How does hydrogen peroxide cure cold sores

  • Hydrogen peroxide is an antiseptic meaning that it will cleanse the skin on the affected area, as a result, killing germs present on the skin surface hence preventing this are from getting infected.
  • Possessing anti-viral properties hydrogen peroxide weakens the molecular framework of the virus by discharging the oxygen atom.
  • The last thing anyone wants is an ugly scar on their lips. Hydrogen peroxide possessing bleaching properties lighten the scars that might be left behind by these blisters ensuring that your skin gets back to normal once you heal.

How to use hydrogen peroxide to treat cold sore

Gargle Hydrogen peroxide

Mix 1/2 a cup of hydrogen peroxide solution with 1//2 a cup of water.Apply this solution on the affected area directly or gargle the solution if the affected area is the lip. Do this at least once per day until the cold sore heals.

N/B Always ensure that you use 3% concentration of hydrogen peroxide. After you gargle spit the solution, don’t swallow it!

Salt and hydrogen peroxide

Mix 1 teaspoon of salt with 3% concentrated hydrogen peroxide to form a paste. Apply this paste on the affected area and let it dry. Once dry, rinse the area with plenty of water. For efficiency apply at least twice in a day.

Hydrogen peroxide and baking soda to treat cold sore

Mix hydrogen peroxide solution with 1 teaspoon of baking soda to form a paste. Apply the paste on the affected area and after 10 minutes rinse the area with plenty of water. Apply only once per day until the blisters heal.

Asprin and hydrogen peroxide

Crush to powder one asprin tablet. Mix this powder with hydrogen peroxide solution to form a paste. Apply the paste on the affected area. Let the paste dry and after approximately 10 minutes rinse the area with plenty of water. For efficiency apply once per day.


You don’t always have to go to the hospital when you have cold sores. This article has walked you the various procedures in which you can cure these annoying fever blisters when in the comfort of your house.


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