burn
The Spanish word 'quemadura' translates to 'burn' in English. It can be used to describe physical injuries caused by heat, chemistry, electricity or radiation. Similarly, in Spanish, it is used to represent the wound, scar, or injury on the skin or organ due to exposure to extreme heat, corrosive chemicals, electricity, or radiation. This word has a similar application in medical context as in English.
I have a third degree burn.
This sentence refers to the speaker expressing that they have a severe burn, specifically a third degree burn, which is the most severe type of burn damaging all layers of skin.
The sunburn is very painful.
In this example, the speaker is describing how painful a sunburn can be. This implies that they might have recently experienced a sunburn, or are observing someone else who has.
The cream is for burns.
This phrase can be used in a context where someone is either suggesting to use or explaining about a certain cream that is made to treat burns.