1. Minor injuries like cuts, bruises, and punctures can easily become infected if not treated properly with first aid. While they may seem insignificant, infections can spread rapidly and cause serious pain, permanent disability, or even death if left untreated. 2. The skin acts as a protective barrier against germs, but when it is broken during an injury, germs can enter the open wound and multiply, causing an infection. 3. All injuries, no matter how minor they seem, should receive first aid treatment. This includes cleaning the wound, applying a bandage, and monitoring for signs of infection like increased pain or swelling. Neglecting any injury risks infection.