An injury to the skin caused by heat, chemicals, friction, etc.; commonly called 'yakedo' in everyday speech, and 'kashō' in medical contexts.
昨夜、料理中に熱い油で火傷（かしょう）してしまった。
Last night I burned myself with hot oil while cooking.
彼女は軽い火傷で済んだが、念のため病院で見てもらった。
She only had a minor burn, but she went to the hospital just in case.
医師は火傷の程度を詳しく調べた。
The doctor examined the severity of the burn in detail.