What action should be taken if the casualty is experiencing vomiting?

When a casualty is experiencing vomiting, turning their head to the side is crucial to prevent choking and aspiration. This position allows the vomit to exit the mouth freely without risking airway obstruction. It’s important to ensure that the airway remains clear, as aspiration can lead to serious complications such as aspiration pneumonia, which can occur if vomit is inhaled into the lungs.

Holding the person upright might seem intuitive, but it may not effectively protect the airway if vomiting occurs. Positioning them facing downwards is dangerous as it can lead to suffocation or airway blockage. Keeping their head still may not provide the necessary safety to manage the risk of vomit entering the airways. Thus, turning their head to the side is the most effective action to take to safeguard the casualty during an episode of vomiting.