Which term describes anesthesia applied to the surface of the skin to numb a surface area?

• A. Hematocrit
• B. Hemorrhage
• C. Regional anesthesia
• D. Topical anesthesia

Answer: (D)

Topical anesthesia describes anesthesia applied to the surface of the skin to numb a small area. It works by blocking the nerve endings in the skin so pain signals don’t get carried to the brain, giving quick, localized numbness. This is different from regional anesthesia, which involves injecting near a cluster of nerves to numb a larger region, and it’s not related to hematocrit (a blood test measure) or hemorrhage (bleeding). Topical anesthetics are common in creams, gels, sprays, or patches with agents like lidocaine or benzocaine for minor skin procedures or before needle sticks.