Drug use relapse occurs when an individual who has previously stopped using drugs returns to using them again. Relapse can occur at any time during the recovery process, and it can be triggered by various factors such as stress, exposure to drugs or drug-related cues, negative emotions, and social pressure. The risk of relapse is highest during the early stages of recovery, but it can also occur later on. Relapse is a common challenge in addiction recovery, and it does not necessarily indicate failure or weakness. Rather, it is a natural part of the recovery process, and many people who experience relapse go on to achieve long-term sobriety with additional support and treatment.