What does a sign in first aid refer to?

A sign in first aid refers specifically to an obvious visible physical indication of injury. This could include observable symptoms such as swelling, bruising, bleeding, or any other physical manifestations that can be seen or measured by an observer, such as a lifeguard or first aider. Signs are crucial because they provide concrete evidence of a person's condition and help guide subsequent medical responses or interventions.

In the context of first aid, distinguishing signs from symptoms is important. Signs can be objectively identified by anyone, while symptoms are subjective feelings reported by the individual, such as pain or nausea, which can vary from person to person. A medical diagnosis made by a doctor is a more formal assessment and includes various signs and symptoms but is not within the scope of immediate first aid. Lastly, a medical procedure performed on a casualty relates to actions taken based on the signs and symptoms identified, but it does not define what a sign itself is. Understanding the definition of signs enables lifeguards and first aiders to better evaluate the situation and provide appropriate care.