What is the first step for treating a serious burn?

Cooling the burn area with running water is crucial because it helps reduce the temperature of the burned skin, minimizing further damage and alleviating pain. This immediate action can also prevent the burn from worsening, as it effectively dissipates heat. The recommended cooling period is typically around 10 to 20 minutes, using cool (not cold) running water, which is ideal for treating burns effectively.

Applying ointment immediately may delay cooling the burn and could introduce contaminants to the wound, which is not advisable before the area is properly cooled. Covering the burn with plastic wrap is a step to take after cooling it adequately, primarily designed to protect the burn while allowing it to breathe. Leaving it alone is not recommended, as it would not address the immediate need for cooling, thus potentially worsening the injury and increasing pain.