DictionaryrelapseReturn to a worse condition
noun / verb

relapse

REE-laps/rilˈæps/

A return to a previous harmful condition or behavior after improvement.

The adult suffers a relapse, returning to the couch with a fever after improving.

Two linked moments of same adult: first recovered upright with folded blanket, then returned to couch with feverish tired face and thermometer; worse condition returns after improvement, no diagnosis or medication instructions.
Etymology

The underlying image is slipping backward. Applied to health or behavior, it describes losing an improvement and falling back into a former bad condition or practice.

In context

FRAME BY FRAME Studio - Alon Vagenfeld23:24
ninety percent improve after a year they do relapse so after a few years they sometimes relapse
Interventional Pain Management un Children - Dr. David Pang

More examples

  • He relapsed into heavy drinking after several months of sobriety.
  • The infection seemed gone, but a relapse required further treatment.
  • Regular support helps her avoid relapsing into harmful habits.

Forms

relapse · relapses · relapsed · relapsing

Similar words

recurrence
Means something happens again, without necessarily following improvement.
backslide
Emphasizes returning to bad habits rather than renewed illness.
setback
Interrupts progress without necessarily restoring a previous harmful condition.