Medicine & Health
How does anesthesia work?
Anesthesia works by using drugs to block pain and, for major surgery, switch off consciousness. General anesthesia acts on the brain and nervous system to make you fully unconscious and unaware, while local anesthesia just numbs one area.
See it in motion.
Watch a 2-minute animated lesson that shows exactly how anesthesia works.
Step by step
- 1Local anesthesia blocks nerve signals in a small area (you stay awake).
- 2General anesthesia acts on the brain to make you unconscious.
- 3It suppresses pain, awareness, memory, and movement during surgery.
- 4Anesthesiologists carefully monitor and adjust it throughout.
Frequently asked questions
- What's the difference between local and general anesthesia?
- Local numbs one area while you're awake; general makes you fully unconscious for major surgery.
- How does general anesthesia make you unconscious?
- Drugs act on the brain and nervous system to suppress awareness, pain, and memory.
- Is anesthesia safe?
- Modern anesthesia is very safe, with anesthesiologists constantly monitoring your vital signs.