The act or situation of relapsing.
a drug relapse
An occasion when a person becomes ill again after a period of improvement
One who has relapsed, or fallen back into error; a backslider.
To fall back again; to slide or turn back into a former state or practice.
He has improved recently but keeps relapsing into states of utter confusion.
(of a disease) To recur; to worsen, be aggravated (after a period of improvement).
To slip or slide back physically; to turn back.