Relapse

Relapse is a sustained or substantial return to a previous problematic behavior after that behavior has been reduced, stopped, or brought under control. The term is widely used in addiction and other behavior-change fields, although exact operational definitions differ across studies and behaviors .^1,2

Relapse is commonly distinguished from a lapse. A lapse is a temporary or limited reappearance of the previous behavior, while relapse describes a more prolonged or severe return toward the earlier pattern. The difference is not always captured by a universal numerical threshold, so research and clinical work should specify what counts as each outcome for the behavior being studied .¹

Modern relapse-prevention models often describe relapse as a process rather than a single moment. A return to the target behavior may be influenced by high-risk situations, coping responses, self-efficacy, emotional states, environmental cues, and what happens after an initial lapse. This process view also means that a lapse is not automatically equivalent to treatment failure or an inevitable progression to relapse. The term “relapse” is most informative when it is used precisely and separately from brief setbacks .^1,2