You may get burns by various sources, the most common of which are hot liquids, hot objects, chemicals, steam, electricity, the sun, and fire.
Burns are generally categorized into the following three classifications:
First-degree burns:
A first-degree burn is the least serious type of burn that you can suffer, and involves only the outermost layer of your skin. Your skin will likely be spotted and painful. It can also be swollen. In general, if a first-degree burn does not cover a significant portion of your body, it can be treated at home.