pure peroxide is a very caustic substance that can burn tissue. if you want to rinse with hydrogen peroxide you must dilute it with water at least a 2:1 ratio of water to peroxide. peroxide does help kill a lot of germs but use it in combination with mouthwash and regular flossing.
i have rinsed my mouth with peroxide every day for a while. could this cause white spots inside my mouth and on my gums?