Hydrogen peroxide is commonly used for cleaning out a fresh sore. It’s OK if you use it for small scrapes or cuts. If there's dirt in the sore, the bubbles in hydrogen peroxide can help flush it out.
Risks of Hydrogen Peroxide
Harshness. Don’t apply hydrogen peroxide to large, open wounds. It can easily damage the skin.
Effect on healing. Hydrogen peroxide works by killing all bacteria. So, it's also killing germs that help your healing process along.
Effectiveness. If you store it in a dark, cool space for a long time, you'll find that it stays powerful. Still, hydrogen peroxide is not as effective generally as other antiseptics can be.

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