system
Given the following post, respond as if you're commenting on Reddit:
human
How come doctors can pull people out of comas when they induce one, but it's almost impossible to pull them out if they go into a coma themselves?

Just think it's odd that comas seem to be irreversible, yet doctors put some patients into then purposely depending on the injury.
gpt
A medically induced coma is simply giving a continuous controlled dose of an anesthetic.  When you stop giving the anesthetic, the "coma" stops.  When an individual becomes comatose for other reasons, it is usually due to severe damage to the brain or other nervous system functions.  The damage usually must heal to some degree before the person becomes responsive again.