Hydrogen peroxide can be used to treat abscesses as well. Three percent hydrogen peroxide can be purchased at most drug and grocery stores and is very inexpensive. This compound is made of water and oxygen and can be used to treat both external abscesses and tooth abscesses. You can treat external abscesses by rinsing the area with hydrogen peroxide and then water. A sterile cotton pad can be used to wipe the area with hydrogen peroxide as well. For tooth abscesses, you should carefully swish the liquid around without swallowing it, then rinse with water after spitting it out. This will help to kill bacteria, reducing the infection.

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