General anesthesia makes you unconscious and is used during many surgical procedures. Anesthesia is defined as a medication for preventing pain. Multiple types are available. Some allow you to be alert and oriented during a medical procedure, while others make sleep so you're blissfully unaware of what's going on. The type of anesthesia you get depends on the nature of the procedure being performed, your age and overall health, and the preferences of the surgeon and anesthesia provider. With some procedures, you may be able to choose between different types of anesthesia, while other procedures require a specific type.