Hydrogen peroxide that is, aqueous hydrogen peroxide solution, daily disinfection with medical hydrogen peroxide, commonly used in cleaning wounds, burns, ulcers, abscess sinus, pus in the ear, etc., can also be used as a gargle for tonsillitis, stomatitis, diphtheria, pharyngitis, etc., if not used properly may produce harm, so when using it, be sure to understand the relevant precautions. First, the hazards of hydrogen peroxide on the skin and mucous membranes with corrosive, inadvertent inhalation of high concentrations of hydrogen peroxide may irritate the mucous membranes of the mouth and nose, skin contact may appear white crust; used to clean wounds, due to the hydrogen peroxide gas production is too fast, in the deeper cavities there is a risk of causing embolism and expanding the risk of infection. Precautions 1, the use of hydrogen peroxide should avoid contact with eyes, nose and skin and other parts of the skin to prevent skin and mucous membrane damage, not accidentally eaten, otherwise it will cause damage to the digestive tract; 2, deep pus cavity should be careful to use hydrogen peroxide disinfection; 3, hydrogen peroxide solution is incompatible with reductants, including organic substances and oxides, some metals, metallic salts, alkali iodide, permanganate and other strong oxidizing agents, and should not be mixed; 4, pregnant women and breastfeeding, the rapid production of hydrogen peroxide gas in the deep cavity there is a risk of causing embolism and expanding the infection. Mixed use; 4, pregnant women and lactating women should be cautious; 5, hydrogen peroxide solution is easy to decompose and deteriorate when exposed to light and heat, it should be shielded from light, sealed, and stored in a cool place; 6, the use of the concentration should not be too high, and it is not recommended to mix their own high-concentration hydrogen peroxide to disinfect.