If I use hydrogen peroxide to whiten my teeth, will it hurt cuts inside my mouth?

Also, how often should I use it? I here you also mix baking soda with it so what is the solution exactly?
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Hydrogen Peroxide will not hurt the cuts inside your mouth. Actually is will help to heal them for you. I would not use the hydrogen peroxide every day, that may be a little hard on the delicate tissue in you mouth. Hope your teeth get nice and white. I have done that myself, it is a good disinfectant for your mouth also.
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