Acid, alkali or other chemical substances caused by burns, all should be quickly removed from the impregnated clothing and rinsed with a large amount of water for a long time, in order to dilute and remove the purpose of the chemical substances that remain on the trauma. In undressing as soon as possible, pay attention to fast, but also pay attention to protection, do not let the clothes impregnated with chemicals touch the unburned skin, so that the burned area increases. Rinsing with water should pay attention to the amount of water to be large and long enough, because some chemicals will produce heat when they meet water, if the amount of water is not enough, heat dissipation is not sufficient, but will be additional thermal burns. For acid and alkali burns, the method of neutralization is generally not advocated, or the rinsing with water. If there is no contraindication and tolerance problems, a large amount of water rinsing time should not be less than 30 minutes. Contact with quicklime, encountering moisture on the skin surface, calcium oxide will turn into calcium hydroxide, while producing heat, causing alkali and thermal burns. Lime should be wiped clean with a dry cloth or soft brush first, then rinse with plenty of water to avoid lime in contact with aquatic heat aggravate the burn. Phosphorus burns, because the spontaneous combustion point of inorganic phosphorus is low, if exposed to air, it is easy to spontaneous combustion, so the scene in addition to rinsing with a lot of water, should go out as far as possible visible phosphorus particles, and then wrap the wound with a wet cloth, so that phosphorus and air isolation to prevent continued combustion. Note that you can not use any oil-based dressings to dress the wound to avoid the dissolution and absorption of phosphorus, leading to more serious phosphorus poisoning.