Commonly, burn is regarded as heat injury, caused by hydrotherm (hot water, oils), vapor, gas with high temperature, flame, blazing metal liquid and solid (steel water and steel slab).

• 狭义的烧伤即指热力烧伤，如热液（水汤、油等）、蒸汽、高温气体、火焰、炽热金属液体或固体（钢水、钢锭等）所造成的烧伤，其中人们习惯上将热液、蒸汽所致的烧伤称之为烫伤。