Which of the following actions is NOT part of first aid for contact injuries?

Leaving blisters intact is an important action in the first aid protocol for contact injuries because blisters form as a protective barrier over the damaged skin. They contain fluid that helps cushion the area and promote healing while preventing further irritation or infection. By preserving the blister, it allows the body to naturally heal itself without exposing the underlying skin to potential contaminants.

In contrast, controlling bleeding, washing the area thoroughly, and removing any foreign material are all proactive measures that address immediate concerns related to the injury and are essential steps in first aid. Controlling bleeding helps prevent excessive blood loss and stabilize the affected area, while washing the injury thoroughly is crucial for preventing infection. Removing foreign material ensures that there is no debris that could complicate healing or lead to infection.