In internal medicine,<unk>  or recidivism is a recurrence of a past (typically medical) condition. For example, multiple sclerosis and malaria often exhibit peaks of activity and sometimes very long periods of dormancy, followed by<unk>  or recrudescence. In psychiatry,<unk>  or reinstatement of drug-seeking behavior, is a form of spontaneous recovery that involves the recurrence of pathological drug use or self harm after a period of recovery.<unk>  is often observed in individuals who have developed a drug addiction or either form of drug dependence, as well as those who have a Mental disorder.
Relapse
Remission 
Convalescence
Residency 
Regression 
Latch 
Recrudescence
Heal 