Generally,burns include three different categories of severity:superficial,partial thickness and full thickness.Chemical burns are always partial thickness,and in severe cases can be full thickness.Therefore,giving first aid is incredibly important.But how can you do that successfully?

　　Check for any dangers to yourself.The chemicals that cause the victim抯 injuries could also become a dangerk to you.Try to establish what cause the burn and how safe the chemicals are.If you are in an enclosed area,move the victim outside or open windows to prevent the build-up of fumes (臭气).You should not forget to wear gloves.

　　Cool the burn with running water for at least 15-20 minutes.Make sure that you do not come into contact with the water used to cool the burn as it may contain the harmful chemical.

　　If any clothing has come into contact with the chemical,it should be removed providing it isn抰 sticking to the burn.Try to identify the chemical involved and its container.h

　　Cover the burn with a sterile (消过毒的) first-aid dressing.If no dressing is available,then use other items,which include cling film (保鲜膜) and plastic bags.

　　If the burn is serious,the victim shows signs of shock or the victim becomes drowsy (昏昏欲睡的) consciousness,then call an emergency ambulance immediately.If a large chemical spill has occurred,then also ensure the firemen and policemen have also been informed.If you become exposed to the chemical involved,then you should seek medical advice immediately.

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