A burn is a type of injury which damages layers of skin (such as epidermis, dermis, and hypodermis).
- Contact with flame, hot liquids, steams, chemicals etc..
- Heat generated due to an explosion
- Passage of electricity through the human body for a longer time
First-degree burns are called a superficial burn which damages only the epidermis, the first layer of skin. Symptoms: Skin may get red.
Second degree burns damages both the epidermis and the dermis (the dermis is the second layer of skin). Symptoms: These burns are painful. The injured area can swell and appear red with blisters.
Third-degree burns damage through the epidermis and dermis and affect deeper tissues. Symptoms: The injured area can appear charred and may be black, white, or deep red.
Fourth-degree burns are deeper, damage the skin, fat, muscle and maybe bones.
The burn size (per cent %) can be assessed through the diagram (shown below) called the Rule of Nines.
The severity of a burn injury may depend on the followings:
- Degree of the burn
- Percentage of the skin burned
- Age of the injured person
- Other parameters: the body part which is affected, inhalation of any toxic gases or smoke, type of burn, medical condition of the victim etc.