The recurrence of symptoms following a period when a disease seemed to have been improving.
The reappearance of symptoms of a disease which seemed to have got better.
Return of symptoms of a disease soon after they disappeared and recovery appeared to be underway.
A fresh outbreak of a disorder in a patient after a period during which its signs and symptoms had died down and recovery seemed to be taking place.
The reappearance of a disease after a period without signs or symptoms of its presence.
The recurrence of an illness after seeming recovery, with the duration of this period being shorter than what is typically called a “relapse.”