1. the return or revival of something undesirable after a period of improvement or absence
Usage: formal
2. the return of symptoms of a disease after apparent recovery
Usage: medical

Examples

• The recrudescence of violence in the region alarmed international observers.
• After years of peace, there was a troubling recrudescence of ethnic tensions.
• The patient experienced a recrudescence of symptoms just weeks after treatment.
• Historians noted the recrudescence of nationalist movements across Europe.
• The recrudescence of the infection required immediate medical attention.
• Economic instability led to a recrudescence of social unrest.
• The doctor warned about possible recrudescence if medication was stopped early.