Hydrogen peroxide is used by applying the appropriate amount to the wound surface, the wound surface will be oxidized and whitened, and bubbling, wash with water after use. Hydrogen peroxide has a certain degree of irritation, need to be careful when using. Hydrogen peroxide has an oxidizing effect, when used, you can apply the appropriate amount of hydrogen peroxide on the wound surface, the wound surface will be oxidized white and bubbling, this is a normal phenomenon, after the use of water can be washed, it will be in 3-5 minutes to restore the original skin color. Note that the following cases can not use hydrogen peroxide: first of all, shallow wounds do not need to use hydrogen peroxide to clean, it will stimulate the subcutaneous nerve endings, the wound will be swollen, not easy to heal. Secondly, when changing the medicine, fresh granulation tissue in normal growth, should not be flushed with hydrogen peroxide, so as not to damage the normal tissue cells. Finally do not use hydrogen peroxide in special areas, such as eye wounds, abdominal trauma and so on. Hydrogen peroxide is a strong oxidizer. If the concentration is too high, it will cause some harm to the human body. When the concentration of hydrogen peroxide is higher than 3%, it is strongly corrosive. A small amount of inhalation can cause damage to various systems such as respiratory, digestive, and nervous systems, causing skin swelling, chest pain, respiratory distress, epilepsy, and other manifestations. In addition, it can cause vision loss, blindness and other adverse effects on the eyes. In case of inadvertent contact with hydrogen peroxide, it should be flushed with water promptly. If you need to use hydrogen peroxide, you need to operate under the guidance of a professional doctor, not blindly use it yourself.