Which of the following is not classified as a minor injury according to Safety Bulletin 7?

Sprains or strains are typically categorized as injuries that can exhibit various degrees of severity and may require more attention than what is considered a minor injury. While minor cuts, bruises, and small burns generally involve external skin damage and can often heal quickly with minimal intervention, sprains or strains involve the ligaments or muscles and could indicate a more significant level of injury. Minor discoloration associated with sprains or strains often points to underlying tissue damage, which can necessitate further evaluation and treatment, distinguishing it from injuries that are more straightforwardly classified as minor.

This classification is essential for ensuring that appropriate responses and treatments are administered based on the potential severity of an injury, which is why sprains or strains with even minor discoloration are not classified as minor injuries according to Safety Bulletin 7.