Cleaning Cuts With Hydrogen Peroxide
For most minor cuts and scrapes, rinsing thoroughly with plenty of clean water, removing foreign bodies, and cleaning the surrounding area with soap is effective in preventing infection. It's also less irritating to wounded tissue. Once a first-line treatment, hydrogen peroxide is useful when you don't have access to clean water, but it is not recommended for deep cuts, bites, or burns. See a doctor immediately for those.
Consider attending a first-aid course to ensure your knowledge base.