What is the first question to ask when assessing a casualty's condition?

The first question to ask when assessing a casualty's condition should be "What is the matter?" This question is essential because it directly addresses the individual's current situation and helps you gather immediate and relevant information about their symptoms or reasons for distress. By asking this straightforward question, you invite the casualty to describe their condition in their own words, which can provide critical insights into the nature and severity of their issue.

This approach not only helps in identifying the problem at hand but also establishes rapport with the casualty, making them feel heard and understood. Gathering this information early in the assessment is crucial for determining the appropriate first aid response and for deciding if further medical assistance is required.

Other options may provide useful information but do not directly assess the immediate situation. Asking about past conditions or medication can be important later on in the evaluation but is not the best starting point when trying to understand the current issue the casualty is facing. Therefore, initiating the assessment with "What is the matter?" allows for a more focused and effective approach to first aid.