How do cravings work between uses?

Cravings arise from learned associations between drug use and specific cues, such as stress, emotions, environments, or reminders of past use. These cues can activate brain systems involved in motivation and memory, producing a strong urge to use even in the absence of the drug.

Between uses, cravings are often intermittent rather than constant. They may be triggered suddenly, vary in intensity, and typically diminish over time if not acted upon. The strength of cravings depends on prior patterns of use and how strongly cues have been linked to the drug.

Cravings are a core feature of substance use disorders because they can drive continued use and relapse. Their presence reflects underlying changes in brain function, not simply a lack of willpower.