Anesthesia — a reflection of misperception. The reflection of a desire to escape from reality.
Anesthesia can mean obtusion of feelings. It is inability to perceive the events round you. She even can specify that you leave from life. Whether you leave from own emotions? Even if it is painful, be given for a while to the power of emotions. Perhaps, it will cure you.
To use anesthesia in your dream, suggests that you are trying to suppress your emotions instead of confronting them. There may be situation in your life that you are desperately trying to avoid. You are refusing to take responsibility for your actions.
(See Chloroform, Ether, Novocaine.) To take an anesthetic against your will points towards a painful sickness. Willingly to undergo anesthesia is a prophecy of better health.